Atomic Scaled Depth Correlation to the Oxygen Reduction Reaction Performance of Single Atom Ni Alloy to the NiO2 Supported Pd Nanocrystal

被引:7
|
作者
Li, Haolin [1 ,2 ,3 ]
Dai, Sheng [4 ]
Wu, Yawei [3 ]
Dong, Qi [5 ]
Chen, Jianjun [1 ]
Chen, Hsin-Yi Tiffany [2 ]
Hu, Alice [3 ,6 ]
Chou, Jyh-Pin [7 ]
Chen, Tsan-Yao [2 ,8 ,9 ]
机构
[1] Zhejiang Sci Tech Univ, Sch Mat Sci & Engn, Hangzhou 310018, Peoples R China
[2] Natl Tsing Hua Univ, Dept Engn & Syst Sci, Hsinchu 300044, Taiwan
[3] City Univ Hong Kong, Dept Mech Engn, Hong Kong 999077, Peoples R China
[4] East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200234, Peoples R China
[5] Tsinghua Univ, Dept Elect Engn, Beijing 100084, Peoples R China
[6] City Univ Hong Kong, Dept Mat Sci & Engn, Hong Kong 999077, Peoples R China
[7] Natl Changhua Univ Educ, Dept Phys, Changhua 50007, Taiwan
[8] Natl Cheng Kung Univ, Hierarch Green Energy Mat Hi GEM Res Ctr, Tainan 70101, Taiwan
[9] Natl Taiwan Univ Sci & Technol, Dept Mat Sci & Engn, Taipei 10617, Taiwan
关键词
bimetallic catalysts; DFT calculations; fuel cell; oxygen reduction reaction; GENERALIZED GRADIENT APPROXIMATION; TOTAL-ENERGY CALCULATIONS; ELASTIC BAND METHOD; FUEL-CELLS; ELECTRONIC-STRUCTURE; TRANSITION; CATALYSTS; ELECTROCATALYSTS; CHALLENGES; CLUSTERS;
D O I
10.1002/advs.202207109
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
This study demonstrates the intercalation of single-atom Ni (Ni-SA) substantially reduces the reaction activity of Ni oxide supported Pd nanoparticle (NiO2/Pd) in the oxygen reduction reaction (ORR). The results indicate the transition states kinetically consolidate the adsorption energy for the chemisorbed O and OH- species on the ORR activity. Notably, the NiO2/Ni-1/Pd performs the optimum ORR behavior with the lowest barrier of 0.49 eV and moderate second-step barrier of 0.30 eV consequently confirming its utmost ORR performance. Through the stepwise cross-level demonstrations, a structure-E-ads-Delta E correspondence for the proposed NiO2/Ni-n/Pd systems is established. Most importantly, such a correspondence reveals that the electronic structure of heterogeneous catalysts can be significantly differed by the segregation of atomic clusters in different dimensions and locations. Besides, the doping-depth effect exploration of the Ni-SA in the NiO2/Pd structure intrinsically elucidates that the Ni atom doping in the subsurface induces the most fruitful Ni-SA/Pd-ML synergy combining the electronic and strain effects to optimize the ORR, whereas this desired synergy diminishes at high Pd coverages. Overall, the results not only rationalize the variation in the redox properties but most importantly provides a precision evaluation of the process window for optimizing the configuration and composition of bimetallic catalysts in practical experiments.
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页数:13
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