DataVXAdvanced MaterialsPaper
journal article·2024-03

Frank Partial Dislocations in Coplanar Ir/C Ultrathin Nanosheets Boost Hydrogen Evolution Reaction

Pengfei Liu, Xin Zhang, Jiawei Fei, Yue Shi, Jiawei Zhu, Dan Zhang, Liang Zhao, Lei Wang, Jianping Lai

Advanced Materials· Volume 36· Issue 11
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Source abstract

Abstract

Abstract Developing highly active and stable acidic hydrogen evolution catalysts is of great significance and challenge for the long‐term operation of commercial proton exchange membrane (PEM) electrolyzers. In this work, coplanar ultrathin nanosheets composed of rich‐Frank partial dislocations (FPDs) are first synthesized. Ir nanoparticles and carbon (Dr‐Ir/C NSs) use a nonequilibrium high‐temperature thermal shock method (>1200 °C) and KBr template‐assisted techniques. Dr‐Ir/C NSs exhibit excellent hydrogen evolution reaction (HER) performance with a remarkably high mass activity of 6.64 A mg−1 at 50 mV, which is among the best Ir‐based catalysts.In addition, Dr‐Ir/C NSs are able to operate stably at 1.0 A cm−2 for 200 h as a cathode in a PEM electrolyser, and the original coplanar ultrathin nanosheets structure are maintained after the test, demonstrating excellent stability against stacking and agglomeration. Geometrical phase analysis and theoretical calculations show that the FPDs produce a 4% compressive strain in the Dr‐Ir/C NSs, and the compressive strain weaken the adsorption of H* by Ir, thus increasing the intrinsic activity of the catalyst.
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Research context

Energy storageNanomaterialsCatalysis & surfaces

OpenAlex topics: Electrocatalysts for Energy Conversion · Fuel Cells and Related Materials · Advanced battery technologies research

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

Affiliations

State Key Laboratory Base of Eco‐Chemical Engineering International Science and Technology Cooperation Base of Eco‐chemical Engineering and Green Manufacturing College of Chemistry and Molecular Engineering Qingdao University of Science and Technology Qingdao 266042 P. R. China

Key Laboratory of Eco‐chemical Engineering Ministry of Education International Science and Technology Cooperation Base of Eco‐chemical Engineering and Green Manufacturing College of Chemical Engineering Qingdao University of Science and Technology Qingdao 266042 P. R. China

Key Laboratory of Catalytic Conversion and Clean Energy in Universities of Shandong Province School of Chemistry and Chemical Engineering Qufu Normal University Qufu Shandong 273165 China

Shandong Engineering Research Center for Marine Environment Corrosion and Safety Protection College of Environment and Safety Engineering Qingdao University of Science and Technology Qingdao 266042 P. R. China

Funding

National Natural Science Foundation of China

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