文献类型：期刊文献

英文题名：Hierarchical anions at the electrode-electrolyte interface for synergized neutral water oxidation

作者：Liu, Tao[1,2];Chen, Yuxin[3,4];Hao, Yaming[1,2];Wu, Jianxiang[1,2];Wang, Ran[1,2];Gu, Limin[5];Yang, Xuejing[3];Yang, Qiang[3];Lian, Cheng[4];Liu, Honglai[4];Gong, Ming[1,2]

机构：[1]Fudan Univ, Dept Chem, Shanghai 200438, Peoples R China;[2]Fudan Univ, Shanghai Key Lab Mol Catalysis & Innovat Mat, Shanghai 200438, Peoples R China;[3]East China Univ Sci & Technol, Natl Engn Lab Ind Wastewater Treatment, Shanghai 200237, Peoples R China;[4]East China Univ Sci & Technol, Sch Chem & Mol Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[5]Trina Solar Co Ltd, 2 Tianhe Rd,Trina PV Ind Pk, Changzhou 213031, Jiangsu, Peoples R China

年份：2022

卷号：8

期号：10

起止页码：2700

外文期刊名：CHEM

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000889489000016)】；

基金：M. Gong acknowledges the support from the Shanghai Technology Innovation Program (Carbon-Neutral Program, 21DZ1207800), the National Key R&D Program of China (2019YFC1604602), and the National Natural Science Foundation of China (22172036). C.L. acknowledges the support fromthe National Natural Science Foundation of China (22078088).

语种：英文

摘要：The ion-enriched electrode-electrolyte interface is a unique characteristic of electrocatalytic reactions that can effectively tune the local chemical environment. In this study, we discovered a strong synergy between borate and fluoride anions for water oxidation in neutral conditions. Under an optimal ratio of the two anions, the water oxidation current significantly outperforms the individual counterparts by almost an order of magnitude. This synergy was greatly attributed to the hierarchical anions at the interface, with borate approaching the surface and fluoride extending out, as revealed by in situ surface-enhanced Raman spectroscopy and molecular dynamics simulation. This hierarchical anion arrangement created two kinetics regions, with one borate- dominating region to lower the onset potential and one fluoride-dominating region to sustain a larger current. Using the synergized electrolyte, a low- cost and facilely synthesized Co(OH)(2) electrode could achieve an outstanding performance of 100 mA/cm(2) at 1.791 V versus RHE under pH = 7.87 with a 2-week-long durability.