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Efficient alkaline hydrogen evolution on atomically dispersed Ni-Nx Species anchored porous carbon with embedded Ni nanoparticles by accelerating water dissociation kinetics
Lei, CJ; Wang, Y; Hou, Y; Liu, P; Yang, J; Zhang, T; Zhuang, XD; Chen, MW; Yang, B; Lei, LC; Yuan, C; Qiu, M; Feng, XL
2019
Source PublicationENERGY & ENVIRONMENTAL SCIENCE
ISSN1754-5692
Volume12Issue:1Pages:149—156
Subtype期刊论文
AbstractDeveloping inexpensive and efficient electrocatalysts for hydrogen evolution reaction (HER) during alkaline water electrolysis is crucial for renewable and sustainable energy harvesting. Herein, we report a novel hybrid electrocatalyst comprising atomically dispersed Ni-N-x species anchored porous carbon (Ni-N-C) matrix with embedded Ni nanoparticles for HER. This new catalyst is synthesized via pyrolysis of hydrothermally prepared supermolecular composite of dicyandiamide and Ni ions followed by an acid etching treatment. The achieved hybrid exhibits superior catalytic performance toward HER with a small overpotential of 147 mV at 10 mA cm(-2) and a low Tafel slope of 114 mV dec(-1), comparable to those of state-of-the-art heteroatom-doped nanocarbon catalysts and even outperforming other reported transition-metal-based compounds in basic media. Experimental observations and theoretical calculations reveal that the presence of Ni nanoparticles can optimize surface states of Ni-N-x active centers and reduce energy barriers of dissociated water molecules, which synergistically improve OH- adsorption and promote HER kinetics. When served as electrodes for both cathode and anode, an alkaline water electrolyzer could afford a current density of 10 mA cm(-2) at a low cell voltage of 1.58 V, rivalling the sufficiently high overpotentials of integrated Pt/C-Ir/C benchmark electrodes.
KeywordBIFUNCTIONAL ELECTROCATALYST HIGH-PERFORMANCE GRAPHENE OXIDE NANOSHEETS IDENTIFICATION ADSORPTION CATALYSTS ELECTRODE SITES PHASE
DOI10.1039/c8ee01841c
Indexed BySCI
Language英语
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/31585
Collection中科院上海应用物理研究所2011-2019年
Affiliation1.Zhejiang Univ, Coll Chem & Biol Engn, Minist Educ, Key Lab Biomass Chem Engn, Hangzhou 310027, Peoples R China;
2.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China;
3.Tohoku Univ, WPI Adv Inst Mat Res, Sendai, Miyagi 9808577, Japan;
4.JST, CREST, 4-1-8 Honcho, Kawaguchi, Saitama 3320012, Japan;
5.Tech Univ Dresden, Ctr Adv Elect Dresden Cfaed, D-01062 Dresden, Germany;
6.Tech Univ Dresden, Dept Chem & Food Chem, D-01062 Dresden, Germany;
7.Case Western Reserve Univ, Dept Mech & Aerosp Engn, 10900 Euclid Ave, Cleveland, OH 44106 USA;
8.Cent China Normal Univ, Coll Phys Sci & Technol, Inst Nanosci & Nanotechnol, Wuhan 430079, Hubei, Peoples R China
Recommended Citation
GB/T 7714
Lei, CJ,Wang, Y,Hou, Y,et al. Efficient alkaline hydrogen evolution on atomically dispersed Ni-Nx Species anchored porous carbon with embedded Ni nanoparticles by accelerating water dissociation kinetics[J]. ENERGY & ENVIRONMENTAL SCIENCE,2019,12(1):149—156.
APA Lei, CJ.,Wang, Y.,Hou, Y.,Liu, P.,Yang, J.,...&Feng, XL.(2019).Efficient alkaline hydrogen evolution on atomically dispersed Ni-Nx Species anchored porous carbon with embedded Ni nanoparticles by accelerating water dissociation kinetics.ENERGY & ENVIRONMENTAL SCIENCE,12(1),149—156.
MLA Lei, CJ,et al."Efficient alkaline hydrogen evolution on atomically dispersed Ni-Nx Species anchored porous carbon with embedded Ni nanoparticles by accelerating water dissociation kinetics".ENERGY & ENVIRONMENTAL SCIENCE 12.1(2019):149—156.
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