Tailoring electron transfer with Ce integration in ultrathin Co(OH)2 nanosheets by fast microwave for oxygen evolution reaction

Ya-Nan Zhou; Yong-Ming Chai; Ruo-Yao Fan; Shu-Yue Dou; Bin Dong; Yu Ma; Wen-Li Yu; Meng-Xuan Li; Yu-Lu Zhou; Chen-Guang Liu

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Tailoring electron transfer with Ce integration in ultrathin Co(OH)2 nanosheets by fast microwave for oxygen evolution reaction

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The intrinsic activity of Co(OH)_(2) for oxygen evolution reaction(OER)may be elaborately improved through the suitable valence adjustment.Ce modification at electronic level is proved to be an efficient strategy owing to the flexible transformation of Ce^(3+)/Ce4+.Herein,Ce0.21@Co(OH)_(2) with the optimized Ce doping have been fabricated to tailor the fast electron transfer for the enhanced activity and stability for OER.Firstly,the obtained core-shell structure composed of vertical loose Co(OH)_(2) sheets not only exposes a large number of active sites,but also provides channels for Ce doping.Secondly,the high pressure microwave with instantaneous heating can fast introduce Ce into Co(OH)_(2),obtaining Cex@Co(OH)_(2) with well dispersion and close integration.The intimated interaction between Ce and Co species may provide the"d-f electronic ladders"for accelerating electron transfer of the catalytic surface.Meanwhile,Ce promotes the formation of Co-superoxide intermediate and/or the release of oxygen,which is considered to be the rate-determining step for OER.The electrochemical measurements confirmed the low overpotential of 300 m V at 10 m A cm^(-2) and great stability of Ce0.21@Co(OH)_(2) for OER.This work demonstrates a meaningful approach to realize the tuned electronic structure through metal doping.

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来源
《天然气化学（英文版）》 |2021年第8期|299-305|共7页
作者
Ya-Nan Zhou; Yong-Ming Chai; Ruo-Yao Fan; Shu-Yue Dou; Bin Dong; Yu Ma; Wen-Li Yu; Meng-Xuan Li; Yu-Lu Zhou; Chen-Guang Liu;
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State Key Laboratory of Heavy Oil Processing China University of Petroleum (East China) Qingdao 266580 Shandong China;

State Key Laboratory of Heavy Oil Processing China University of Petroleum (East China) Qingdao 266580 Shandong China;

College of Science China University of Petroleum (East China) Qingdao 266580 Shandong China;

College of Science China University of Petroleum (East China) Qingdao 266580 Shandong China;

State Key Laboratory of Heavy Oil Processing China University of Petroleum (East China) Qingdao 266580 Shandong China;

College of Science China University of Petroleum (East China) Qingdao 266580 Shandong China;

College of Science China University of Petroleum (East China) Qingdao 266580 Shandong China;

College of Science China University of Petroleum (East China) Qingdao 266580 Shandong China;

College of Science China University of Petroleum (East China) Qingdao 266580 Shandong China;

College of Science China University of Petroleum (East China) Qingdao 266580 Shandong China;

State Key Laboratory of Heavy Oil Processing China University of Petroleum (East China) Qingdao 266580 Shandong China;

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Tailoring electron transfer with Ce integration in ultrathin Co(OH)2 nanosheets by fast microwave for oxygen evolution reaction

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