FES Funded Projects Outputs Show only Author
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Efficient standalone solar fuels production for CO2 conversion driven by CuxO@rGO To reduce CO2 and produce solar fuels, a standalone PEC system has been established by combining photoanode with photocathode. A stable BiVO4 photoanode has been constructed by sputtering. And a simple electrodeposition method is proposed to fabricate photocathode based on CuxO. A built-in electric field has been obtained by the p-n junction, which is formed between p-type Cu2O and n-type Cu-doped Cu2O. Graphene oxide (GO) and metal Mo layer has been added to improve the internal transfer and external transfer of energy carrier, respectively. Finally, an efficient photocurrent of more than 0.5 mA/cm2 has been achieved. H2, CO, HCOOH and CH4 could be produced with 0.165 mA/cm2.T02-P03 University of Alberta Activity 2019-10-24 Chenyu Xu, Mengnan Zhu,
Sui, P. , Jingli Luo
T02-P03 Charge-accumulation-induced mixed photocorrosion in the Z-scheme PEC system T02-P03, T12-P02 University of Alberta Activity 2020-11-23 T02-P03, T12-P02 Steering the selectivity of CuO to near unity of CO with in species for CO2 electroreduction T02-P03 University of Alberta Activity 2020-11-23 Sui, P. , Subiao Liu, Chenyu Xu, Jing Xiao,
" Renfei Feng
" , Jingli Luo
T02-P03 Electrochemically reconstructed perovskite with cooperative catalytic sites for CO 2-to-formate conversion Perovskites are the promising catalysts for various reactions, yet their structure evolutions and the composition-function relation in the carbon dioxide reduction reaction (CO2RR) are not fully explored. In this study, we report that the reconstructed BaBiO3 (BBO) perovskite is able to facilitate CO2-to-formate (FA) conversion by both A- (Ba) and B- (Bi) site elements through the cooperative but distinct catalytic mechanisms. Specifically, the electrochemical reductions of BBO trigger the complete rearrangement of atoms with rapid kinetics at catalytically relevant voltages, giving rise to electricity-induced Bi metallene (eBBO) that efficiently generates FA with high selectivity and partial current densities. Moreover, the reconstructed BBO simultaneously enables Ba2+ release to the electrolyte, and the time-resolved FTIR and in situ Raman analysis collectively reveal that the Ba2+ adsorption enables easier CO2 adsorption, thereby leading to enhanced CO2-to-FA conversion. This work is of direct significance in elucidating the cooperative catalysis between A- and B- site elements in perovskites for room-temperature CO2RR.T02-P03, T12-P02 University of Alberta Publication 2022-06-01 Mengnan Zhu, Bo-Wen Zhang, Minrui Gao,
Sui, P. , Chenyu Xu, Lu Gong,
Zeng, H. ,
Shankar, K. ,
Bergens, S. , Jingli Luo
T02-P03, T12-P02 Electrochemically Dismantled Perovskite with Cooperative Catalysis for CO 2-to-Formate Conversion Electrochemical reduction of carbon dioxide (CO2RR) driven by sustainable energy resources holds great promise for realizing the zero net emission of CO2 by converting them to value-added fuels.1–4 For the past few years, substantial efforts have been devoted to boosting CO2RR using different nanostructured catalysts. However, the complicated synthesis procedures and low product yields are usually associated with many of these catalysts, which hinder their scalability. More importantly, many catalysts suffer from the low catalytic activities, high overpotentials, and unsatisfactory selectivity, which collectively impede the large-scale applications of CO2RR technique. In this study, we pursue initiating the CO2 conversion on perovskite-based catalysts BaBiO3 (BBO) to selectively produce formate (FA). The structural/phase evolution of BBO under cathodic potentials, the catalytic performances of electrochemical and photoelectrochemical reduction of CO2RR, and the effect of non-active A-site element (Ba) will be investigated in detail.
Herein, BBO perovskite is fabricated by annealing the sol-gel Ba2+/Bi3+ nitrate mixture at high temperatures. Extensive physical characterizations show that under negative potentials, BBO pre-catalysts undergo irreversible structural and phase transformations, giving rise to Bi metallene with atomic-scale thickness and enlarged surface area, as supported by X-ray diffraction analysis and transmission electron microscopy (Figure 1a, and 1b). Using the fully electrochemically reduced BBO, a near-unity selectivity towards formate (FA) can be achieved at the potential of – 1.2 V vs. RHE in 0.1M KHCO3 solution with the typical H-type electrochemical cell. By coupling the state-of-the-art BiVO3 photoanode to the BBO dark cathode, FA can be generated at a of 80.0 % at a cell voltage of 2.5 V in a PEC cell. Contrarily, only < 1.0 % can be detected at 2.5 V without solar irradiation. Meanwhile, inductively coupled plasma optical emission spectrometry (ICP-OES) analysis suggests that A-site elements (Ba2+) are simultaneously released from the BBO lattice and diffuse to the electrolyte as a result of the complete reduction of BBO. The effect of Ba2+ - containing electrolytes on the CO2RR product distributions have been studied, and the results show that Ba2+ can either facilitate or impede FA production depending on both the external potential and the concentration of Ba2+ (Figure 1c). Specifically, high Ba2+ concentration and more negative potentials (i.e., 25 mM Ba2+ and -1.1 - -1.3 V vs. RHE) tend to favor HER over CO2RR due to the formation of BaCO3 precipitates, whereas low Ba2+ concentrations and more positive potentials (i.e., 2.5 and 7.5 mM Ba2+ and -0.9 - -1.1 V vs. RHE) can significantly enhance the selectivity towards FA. Density functional theory (DFT) calculations show that suitable barium ion adsorption promotes CO2-to-FA conversion by regulating the adsorption strength of *OCHO and *HCOOH intermediates. Our study utilizes both A- and B- site elements in BBO to benefit CO2 conversion, which may be extended to other perovskite electrocatalysts for CO2RR.T02-P03, T12-P02 University of Alberta Activity 2021-10-01 Mengnan Zhu, Bowen Zhang, Minrui Gao, Chenyu Xu,
Sui, P. ,
Zeng, H. ,
Shankar, K. ,
Bergens, S. , Jingli Luo
T02-P03, T12-P02 Alberta Graduate Excellence Scholarship T02-P03 University of Alberta Award 2021-09-01 T02-P03 Directionally maximizing CO selectivity to near-unity over cupric oxide with indium species for electrochemical CO2 reduction T02-P03 University of Alberta Publication 2022-01-01 Sui, P. , Subiao Liu, Chenyu Xu, Jing Xiao,
" Nanqi Duan
" ,
" Renfei Feng
" , Jingli Luo
T02-P03 Interface-Induced Electrocatalytic Enhancement of CO2-to-Formate Conversion on Heterostructured Bismuth-Based Catalysts T02-P03 University of Alberta Publication 2021-11-16 Sui, P. , Chenyu Xu, Mengnan Zhu, Subiao Liu,
" Qingxia Liu
" , Jingli Luo
T02-P03 Steering the Selectivity of CuO to Near-Unity of CO with Indium Species for CO2 Electroreduction T02-P03 University of Alberta Activity 2021-10-19 Sui, P. , Subiao Liu, Chenyu Xu, Jingli Luo
T02-P03 Enhanced CO2 Adsorption Capability for Highly Selective Electroreduction of CO2 to Formate T02-P03 University of Alberta Activity 2021-10-19 Sui, P. , Minrui Gao, Chenyu Xu, Subiao Liu, Mengnan Zhu, Jingli Luo
T02-P03 FGSR Graduate Student Online Conference Award T02-P03 University of Alberta Award 2021-05-01 T02-P03 Bi2O3 Nanosheets Grown on Carbon Nanofiber with Inherent Hydrophobicity for High- Performance CO2 Electroreduction in a Wide Potential Window T02-P03 University of Alberta Publication 2021-10-21 Shao-Qing Liu,
" Ehsan Shahini
" , Minrui Gao,
" Lu Gong
" ,
Sui, P. ,
Tang, T. ,
Zeng, H. , Jingli Luo
T02-P03 Accelerating photoelectric CO2 conversion with a photothermal wavelength-dependent plasmonic local field T02-P03 University of Alberta Publication 2021-07-14 Chenyu Xu,
" Xuhan Zhang
" , Mengnan Zhu,
" Li Zhang
" ,
Sui, P. ,
" Renfei Feng
" ,
" Yanwei Zhang
" , Jingli Luo
T02-P03 In-situ generated hydroxides realize near-unity CO selectivity for electrochemical CO2 reduction T02-P03 University of Alberta Publication 2022-04-01 Jing Xiao, Subiao Liu,
Sui, P. , Xincheng (Alex) Hu,
" Lu Gong
" ,
Zeng, H. , Jingli Luo
T02-P03 Carbon dioxide valorization via formate electrosynthesis in a wide potential window T02-P03 University of Alberta Publication 2022-05-20 Sui, P. , Minrui Gao, Subiao Liu, Chenyu Xu, Mengnan Zhu, Jingli Luo
T02-P03 Unlocking nanotubular bismuth oxyiodide toward carbon-neutral electrosynthesis T02-P03 University of Alberta Publication 2023-02-18 Sui, P. , Minrui Gao, Mengnan Zhu, Chenyu Xu, Yicheng Wang, Subiao Liu, Jingli Luo
T02-P03 Maximizing the Formate Formation of CO2 Electroreduction Via Boosting Charge Transfer Ability T02-P03 University of Alberta Activity 2022-06-01 Sui, P. , Chenyu Xu, Mengnan Zhu, Subiao Liu, Jingli Luo
T02-P03 Nanosecond Laser Confined Bismuth Moiety with Tunable Structures on Graphene for Carbon Dioxide Reduction T02-P03 University of Alberta Publication 2023-04-17 Mengnan Zhu,
" haoqing Jiang
" , Bowen Zhang, Minrui Gao,
Sui, P. ,
" renfei feng
" ,
Shankar, K. ,
Bergens, S. , Gary J Cheng, Jingli Luo
T02-P03 Unveiling phase-selective α-and β-Bi2O3-derived electrocatalysts for CO2 electroreduction T02-P03 University of Alberta Publication 2023-12-21 Sui, P. , Minrui Gao,
" Renfei Feng
" , Subiao Liu, Jingli Luo
T02-P03 Optimizing Bi active sites by Ce doping for boosting formate production in a wide potential window T02-P03, T06-Q03 University of Alberta Publication 2023-12-11 Yicheng Wang,
Sui, P. , Chenyu Xu, Mengnan Zhu,
" Renfei Feng
" ,
" Hongtao Ma
" , Xiaolei Wang, Jingli Luo
T02-P03, T06-Q03 Advancing cathode-gas electrode design: Overcoming CO2 gas solubility limitation in H-cells T02-P03 University of Alberta Publication 2024-03-21 T02-P03 Future Energy Systems Opportunity Award T02-P03 University of Alberta Award 2023-10-18 T02-P03 Engineering strategies toward efficient CO2 electrochemical reduction to C1 products T02-P03 University of Alberta Publication 2023-09-01 T02-P03 Recent Progress in Cathode Material Design for CO2 Electrolysis: From Room Temperature to Elevated Temperatures T02-P03 University of Alberta Publication 2024-04-16 Sui, P. , Minrui Gao, Yicheng Wang, Jingli Luo
T02-P03 Advances in Tandem Strategies for CO2 Electroreduction: From Electrocatalysts to Reaction System Design T02-P03 University of Alberta Publication 2024-11-13 Sui, P. , Yicheng Wang, Xiaolei Wang, Subiao Liu, Jingli Luo
T02-P03 Energy-Conservative CO2 Electroreduction for Efficient Formate Co-generation T02-P03 University of Alberta Publication 2025-04-07 Sui, P. , Mengnan Zhu, Minrui Gao, Yicheng Wang,
" Renfei Feng
" , Xiaolei Wang, Subiao Liu, Jingli Luo
T02-P03 Defective Structure Modulation of Bismuth Oxyiodide for Efficient Formate Electrosynthesis T02-P03 University of Alberta Activity 2024-08-22 T02-P03 Engineering strategies toward efficient CO2 electrochemical reduction on p-block metal-based electrocatalysts T02-P03 University of Alberta Activity 2024-12-03 T02-P03 Approaching Theoretical Limit of Ta3N5 Photoanode via Photothermal-Accelerating Kinetics with Full-Spectrum Utilization T02-P03 University of Alberta Publication 2025-01-07 " Yi Liu
" ,
" Yanwei Zhang
" , Yicheng Wang,
" Xiaopeng Zhan
" ,
Sui, P. , Jingli Luo, Chenyu Xu
T02-P03 Leveraging Inherent Structure of Tin Oxide for Efficient Carbonaceous Products Electrosynthesis T02-P03 University of Alberta Publication 2024-06-27 Sui, P. , Minrui Gao, Yicheng Wang, Subiao Liu, Jingli Luo
T02-P03
