NaCl template-directed approach to ultrathin lamellar molybdenum phosphide-carbon hybrids for efficient hydrogen production

Feng, Qi1,2; Zeng, Lin4; Xu, Jiaoyan1; Zhang, Zhen1,2; Zhao, Zhiliang1; Wang, Yajun4; Yuan, Xiao-Zi5; Li, Hui1,3; Wang, Haijiang3,4

2019-10-31

10.1016/j.jpowsour.2019.227048

JOURNAL OF POWER SOURCES   影响因子和分区

0378-7753

1873-2755

Molybdenum phosphide (MoP) is a prospective non-precious catalyst for hydrogen evolution reaction (HER), though its HER elctrocatalytic performance need to be further enhanced. We first report a facile, easy-scalable and low-cost approach for fabricating porous lamellar MoP/C hybrids by simply mixing the common ingredients of ammonium molybdate, ammonium dihydrogen phosphate, dicyandiamide and sodium chloride (NaCl), followed by freeze-drying, annealing and water-washing. Here, NaCl is used as pore-forming and template-directing agent during the high-temperature annealing and "cooling recrystallization" process. Highly crystalline and ultrafine MoP nanoparticles are intimately wrapped by lamellar carbon nanosheets. The lamellar conductive architecture with ultrathin and porous carbon nanosheets provides multiple attractive properties for HER, such as impeding the growth of nanoparticles, offering an expressway for boosting mass/charge transfer, and delivering large specific surface area with numerous exposed eletrocatalytic sites. Consequently, the MoP/C (NaCl) electrocatalyst presents a low HER overpotential of 118 mV at 10 mA cm(-2) with a small Tafel slope of 50.7 mV dec(-1) in 0.5 M H2SO4, as well as robust stability. Moreover, a home-made electrolyzer using MoP/C (NaCl) as cathode achieves 0.71 A cm(-2) at 2 V-cell at 80 degrees C, and is operated stably for more than 3300 min at 150 mA cm(-2).

Molybdenum phosphide Hydrogen evolution reaction NaCl template Lamellar carbon nanosheet Proton exchange membrane electrolyzer

SCI ; EI

英语

第一 ; 通讯

National Key Research and Development Program of China[2017YFB0102701]

Chemistry ; Electrochemistry ; Energy & Fuels ; Materials Science

Chemistry, Physical ; Electrochemistry ; Energy & Fuels ; Materials Science, Multidisciplinary

WOS:000490030800057

ELSEVIER

20193407350146

Electrocatalysts ; Electrolytic cells ; Hydrogen production ; Nanoparticles ; Nanosheets ; Porous materials ; Slope stability ; Sodium chloride

Roads and Streets:406.2 ; Gas Fuels:522 ; Nanotechnology:761 ; Chemical Agents and Basic Industrial Chemicals:803 ; Solid State Physics:933 ; Materials Science:951

MATERIALS SCIENCE

Web of Science

1.Southern Univ Sci & Technol, Shenzhen Key Lab Hydrogen Energy, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China
2.Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Heilongjiang, Peoples R China
3.Guangdong Prov Key Lab Energy Mat Elect Power, Shenzhen 518055, Peoples R China
4.Southern Univ Sci & Technol, Dept Mech & Energy Engn, Shenzhen 518055, Peoples R China
5.Natl Res Council Canada, Res Ctr Energy Min & Environm, 4250 Wesbrook Mall, Vancouver, BC V6T 1W5, Canada

Feng, Qi,Zeng, Lin,Xu, Jiaoyan,et al. NaCl template-directed approach to ultrathin lamellar molybdenum phosphide-carbon hybrids for efficient hydrogen production[J]. JOURNAL OF POWER SOURCES,2019,438.

Feng, Qi.,Zeng, Lin.,Xu, Jiaoyan.,Zhang, Zhen.,Zhao, Zhiliang.,...&Wang, Haijiang.(2019).NaCl template-directed approach to ultrathin lamellar molybdenum phosphide-carbon hybrids for efficient hydrogen production.JOURNAL OF POWER SOURCES,438.

Feng, Qi,et al."NaCl template-directed approach to ultrathin lamellar molybdenum phosphide-carbon hybrids for efficient hydrogen production".JOURNAL OF POWER SOURCES 438(2019).