| Title | Highly selective palladium-copper bimetallic electrocatalysts for the electrochemical reduction of CO2 to CO |
| Authors | Yin, Zhen Gao, Dunfeng Yao, Siyu Zhao, Bo Cai, Fan Lin, Lili Tang, Pei Zhai, Peng Wang, Guoxiong Ma, Ding Bao, Xinhe |
| Affiliation | Tianjin Polytech Univ, Dept Chem Engn, State Key Lab Separat Membranes & Membrane Proc, Tianjin 300387, Peoples R China. Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, CAS Ctr Excellence Nanosci, Dalian 116023, Peoples R China. Peking Univ, Beijing Natl Lab Mol Sci, Coll Chem & Mol Engn, Beijing 100871, Peoples R China. Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, CAS Ctr Excellence Nanosci, Dalian 116023, Peoples R China. Ma, D (reprint author), Peking Univ, Beijing Natl Lab Mol Sci, Coll Chem & Mol Engn, Beijing 100871, Peoples R China. |
| Keywords | CO2 conversion Electrocatalysis Bimetallic nanocatalysts Pd-based nanoparticles HYDROGEN-STORING MATERIALS CARBON-DIOXIDE ADSORPTION PROPERTIES METAL-ELECTRODES PD NANOPARTICLES CONVERSION SURFACES METHANOL HYDROCARBONS PDCU(111) |
| Issue Date | 2016 |
| Publisher | NANO ENERGY |
| Citation | NANO ENERGY.2016,27,35-43. |
| Abstract | Selective and efficient conversion of carbon dioxide (CO2) to a reusable form of carbon via the electrochemical reduction of CO2 has attracted much attention recently, as it is a promising approach for the storage of renewable energy. Herein, we synthesize palladium-copper bimetallic nanoparticles with different compositions, which serve as a well-defined platform to understand their fundamental catalytic activity in CO2 reduction. Among PdCu/C and Pd/C catalysts tested, Pd85Cu15/C catalyst shows the highest CO Faradaic efficiency of 86%, CO current density of 6.9 mA cm(-2) and mass activity for CO production of 24.5 A g(-1) at 0.89 V vs. RHE in CO2-saturated 0.1 M KHCO3 solution, which is about 5 times, 8 times and 2.2 times higher than Pd/C catalyst, respectively. It was suggested from EXAFS and CO TPD-MS studies that the highly selective CO production on Pd85Cu15/C catalyst is due to the presence of an optimum ratio of the copper element and low-coordination sites over monometallic Pd active for H-2 evolution with low overpotential. We believe that controllable size and composition for the bimetallic nanoparticles are critical to the CO2 reduction activity enhancement and high CO Faradaic efficiency. The insights gained through this work may shed light in a foundation for designing efficient catalysts for electrochemical reduction of CO2. (C) 2016 Elsevier Ltd. All rights reserved. |
| URI | http://hdl.handle.net/20.500.11897/494370 |
| ISSN | 2211-2855 |
| DOI | 10.1016/j.nanocn.2016.06.035 |
| Indexed | SCI(E) EI |
| Appears in Collections: | å å¦ä¸ å å å·¥ç¨ å¦é ¢ |
