In Operando Stacking of Reduced Graphene Oxide for Active Hydrogen Evolution
- 주제(키워드) hydrogen evolution reaction , hydrogen bubble template , reduced graphene oxide , metal-free catalyst , in operando stacking
- 주제(기타) Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
- 설명문(일반) [Ling, Ning; Wang, Zhen; Kim, Sera; Oh, Sang Ho; Shin, Hyunjung; Yang, Heejun] Sungkyunkwan Univ, Dept Energy Sci, Suwon 16419, South Korea; [Park, Jong Hyeok] Yonsei Univ, Dept Chem & Biomol Engn, Seoul 120749, South Korea; [Cho, Suyeon] Ewha Womans Univ, Div Chem Engn & Mat Sci, Seoul 03760, South Korea
- 관리정보기술 faculty
- 등재 SCIE, SCOPUS
- 발행기관 AMER CHEMICAL SOC
- 발행년도 2019
- URI http://www.dcollection.net/handler/ewha/000000165981
- 본문언어 영어
- Published As http://dx.doi.org/10.1021/acsami.9b11619
- PubMed https://pubmed.ncbi.nlm.nih.gov/31661237
초록/요약
Despite the remarkable electronic and mechanical properties of graphene, improving the catalytic activity of the atomically flat, inert, and stable carbon network remains a challenging issue in both fundamental and application studies. In particular, the adsorption of most molecules and ions, including hydrogen (H-2 or H+), on graphene is not favorable, underlining the challenge for an efficient electrochemical catalytic reaction on graphene. Various defects, edges, and functionalization have been suggested to resolve the catalytic issue in graphene, but cost-effectiveness and active catalysis with graphene have not been achieved yet. Here, we introduce dynamic stacking of reduced graphene oxide (rGO) with spontaneously generated hydrogen bubbles to form an efficient electrochemical catalyst with a graphene derivative; the in operando stacking of rGO, without using a high-temperature-based heteroatom doping process or plasma treatment, creates a large catalytic surface area with optimized edges and acidic groups in the rGO. Thus, the uniquely formed stable carbon network achieves active hydrogen evolution with a Tafel slope of 39 mV.dec(-1) and a double layer capacitance of 12.41 mF.cm(-2), which breaks the conventional limit of graphene-based catalysis, suggesting a promising strategy for metal-free catalyst engineering and hydrogen production.
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