@article{Lin2019, 
author = {Rui Lin and Xuelu Ma and Weng-Chon Cheong and Chao Zhang and Wei Zhu and Jiajing Pei and Kaiyue Zhang and Bin Wang and Shiyou Liang and Yuxi Liu and Zhongbin Zhuang and Rong Yu and Hai Xiao and Jun Li and Dingsheng Wang and Qing Peng and Chen Chen and Yadong Li},
title = {PdAg bimetallic electrocatalyst for highly selective reduction of CO2 with low COOH* formation energy and facile CO desorption},
year = {2019},
journal = {Nano Research},
volume = {12},
number = {11},
pages = {2866-2871},
keywords = {CO2 reduction, bimetallic, low overpotential, CO desorption},
url = {https://www.sciopen.com/article/10.1007/s12274-019-2526-1},
doi = {10.1007/s12274-019-2526-1},
abstract = {For electrocatalytic reduction of CO2 to CO, the stabilization of intermediate COOH* and the desorption of CO* are two key steps. Pd can easily stabilize COOH*, whereas the strong CO* binding to Pd surface results in severe poisoning, thus lowering catalytic activity and stability for CO2 reduction. On Ag surface, CO* desorbs readily, while COOH* requires a relatively high formation energy, leading to a high overpotential. In light of the above issues, we successfully designed the PdAg bimetallic catalyst to circumvent the drawbacks of sole Pd and Ag. The PdAg catalyst with Ag-terminated surface not only shows a much lower overpotential (-0.55 V with CO current density of 1 mA/cm2) than Ag (-0.76 V), but also delivers a CO/H2 ratio 18 times as high as that for Pd at the potential of -0.75 V vs. RHE. The issue of CO poisoning is significantly alleviated on Ag-terminated PdAg surface, with the stability well retained after 4 h electrolysis at -0.75 V vs. RHE. Density functional theory (DFT) calculations reveal that the Ag-terminated PdAg surface features a lowered formation energy for COOH* and weakened adsorption for CO*, which both contribute to the enhanced performance for CO2 reduction.}
}