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dc.contributor.authorZhou, Yaoen_US
dc.contributor.authorHao, Weien_US
dc.contributor.authorZhao, Xiaoxuen_US
dc.contributor.authorZhou, Jiadongen_US
dc.contributor.authorYu, Huimeien_US
dc.contributor.authorLin, Boen_US
dc.contributor.authorLiu, Zhengen_US
dc.contributor.authorPennycook, Stephen J.en_US
dc.contributor.authorLi, Shuzhouen_US
dc.contributor.authorFan, Hong Jinen_US
dc.identifier.citationZhou, Y., Hao, W., Zhao, X., Zhou, J., Yu, H., Lin, B., Liu, Z., Pennycook, S. J., Li, S. & Fan, H. J. (2022). Electronegativity-induced charge balancing to boost stability and activity of amorphous electrocatalysts. Advanced Materials, 34(11), e2100537-.
dc.description.abstractAmorphization is an efficient strategy to activate intrinsically inert catalysts. However, the low crystallinity of amorphous catalysts often causes high solubility and poor electrochemical stability in aqueous solution. Here, a different mechanism is developed to simultaneously stabilize and activate the water-soluble amorphous MoSx Oy via a charge-balancing strategy, which is induced by different electronegativity between the co-dopants Rh (2.28) and Sn (1.96). The electron-rich Sn prefers to stabilize the unstable apical O sites in MoSx Oy through charge transfer, which can prevent the H from attacking. Meanwhile, the Rh, as the charge regulator, shifts the main active sites on the basal plane from inert Sn to active apical Rh sites. As a result, the amorphous RhSn-MoSx Oy exhibits drastic enhancement in electrochemical stability (η10 increases only by 12 mV) after 1000 cycles and a distinct activity (η10 : 26 mV and Tafel: 30.8 mV dec-1 ) for the hydrogen evolution reaction in acidic solution. This work paves a route for turning impracticably water-soluble catalysts into treasure and inspires new ideas to design high-performance amorphous electrocatalysts.en_US
dc.description.sponsorshipAgency for Science, Technology and Research (A*STAR)en_US
dc.description.sponsorshipMinistry of Education (MOE)en_US
dc.description.sponsorshipNanyang Technological Universityen_US
dc.relationMOE2016-T2-1- 131en_US
dc.relation.ispartofAdvanced Materialsen_US
dc.rights© 2022 Wiley-VCH GmbH. All rights reserved.en_US
dc.titleElectronegativity-induced charge balancing to boost stability and activity of amorphous electrocatalystsen_US
dc.typeJournal Articleen
dc.contributor.schoolSchool of Physical and Mathematical Sciencesen_US
dc.contributor.schoolSchool of Materials Science and Engineeringen_US
dc.contributor.schoolSchool of Electrical and Electronic Engineeringen_US
dc.subject.keywordsAmorphous Catalystsen_US
dc.subject.keywordsAqueous Stabilityen_US
dc.description.acknowledgementH.J.F. and Y.Z. thank the financial support from Agency for Science, Technology and Research (A*STAR), Singapore by AME Individual Research Grants (A1983c0026), and from Singapore Ministry of Education by Tier 2 grant (MOE2017-T2-1-073). Y.Z. appreciates the support from Science and Technology Commission of Shanghai Municipality (19ZR1465100). S.Z.L. and H.W. appreciate the financial support from Singapore Ministry of Education by Tier 1 (RG8/20). X.X.Z. thanks the support from the Presidential Postdoctoral Fellowship, NTU, Singapore. Z.L., J.D.Z., and X.X.Z. thank the support from Singapore Ministry of Education via AcRF Tier 2 (MOE2019-T2-2-105 and MOE2016-T2-1-131) and AcRF Tier 1 (RG7/18).en_US
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