DataVXAdvanced Energy MaterialsPaper
journal article·2022-12Open access

Promoting Surface Reconstruction of NiFe Layered Double Hydroxide for Enhanced Oxygen Evolution

Hang Lei, Liang Ma, Qixiang Wan, Shaozao Tan, Bo Yang, Zilong Wang, Wenjie Mai, Hong Jin Fan

Advanced Energy Materials· Volume 12· Issue 48
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Source abstract

Abstract

Abstract A dynamic surface reconstruction of oxide electrocatalysts in alkaline media is widely observed especially for layered double hydroxide (LDH), but little is known about how to promote the reconstruction toward desired surfaces for improved oxygen evolution reaction (OER). Here, surface reconstruction of NiFe LDH nanosheets is successfully induced to a higher degree via in situ sulfur doping than that by natural electrochemical activation. Theoretical calculations, operando Raman, and various ex situ characterizations reveal the S anion‐induced effect can lower the energy barrier and facilitate the phase transformation into highly active S‐doped oxyhydroxides. The generated S‐NixFeyOOH can optimize the intermediate adsorption and facilitate the OER kinetics. The reconstructed S‐oxyhydroxides catalyst presents superior OER activity and long‐term durability compared to undoped ones. This work provides a structure–composition–activity relationship during the in situ surface restructuring of NiFe LDH pre‐catalysts.
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Research context

NanomaterialsCatalysis & surfaces

OpenAlex topics: Electrocatalysts for Energy Conversion · Advanced battery technologies research · Supercapacitor Materials and Fabrication

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Guangdong Engineering & Technology Research Centre of Graphene‐like Materials and Products Department of Chemistry College of Chemistry and Materials Science Jinan University Guangzhou 510632 P. R. China

Siyuan Laboratory Guangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy Materials Department of Physics Jinan University Guangzhou 510632 P. R. China

Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education) College of Physics Jilin University Changchun 130012 P. R. China

School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore

Funding

National Natural Science Foundation of China · Ministry of Education of the People's Republic of China · China Scholarship Council

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