Chai, L;
Yuan, W;
Cui, X;
Jiang, H;
Tang, J;
Guo, X;
(2018)
Surface engineering-modulated porous N-doped rod-like molybdenum phosphide catalysts: towards high activity and stability for hydrogen evolution reaction over a wide pH range.
RSC Advances
, 8
(47)
pp. 26871-26879.
10.1039/c8ra03909g.
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Abstract
Electrochemical water splitting is an economic, green and sustainable route to produce hydrogen through the hydrogen evolution reaction (HER). Nowadays, noble metal-free phosphides have been widely used as catalysts in the HER, showing potential applications for both renewable energy production and environmental remediation. Nevertheless, developing surface self-doped MoP electrocatalysts with high HER performances in a wide pH range still remains a challenge. In this work, a novel synthesis strategy was developed to fabricate porous one-dimensional (1D) nitrogen-doped molybdenum phosphide (NMoP) nanorods. The prepared N-MoP-800 catalyst exhibits a low onset potential of 65 mV and low Tafel slope of 58.66 mV dec -1 in 0.5 M H2SO4, which is almost 2 times higher than that of the pristine MoP nanorod anode. Furthermore, the N-MoP materials show long-term durability for 12 h in a wide pH range. The synergistic effects of pyridinic N and N doping in MoP are responsible for the high catalytic activity of N-MoP under acidic conditions, while the N-Mo component plays a key role in enhancing the HER activity of N-MoP. These interesting findings are helpful for the rational design of highly active HER catalysts. More importantly, this study provides a new strategy to synthesize highly active catalysts with low costs for clean energy conversion.
| Type: | Article |
|---|---|
| Title: | Surface engineering-modulated porous N-doped rod-like molybdenum phosphide catalysts: towards high activity and stability for hydrogen evolution reaction over a wide pH range |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1039/c8ra03909g |
| Publisher version: | https://doi.org/10.1039/c8ra03909g |
| Language: | English |
| Additional information: | This article is licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported Licence. See: https://creativecommons.org/licenses/by-nc/3.0/ |
| Keywords: | Science & Technology, Physical Sciences, Chemistry, Multidisciplinary, Chemistry, EFFICIENT ELECTROCATALYST, CARBON, NANOPARTICLES, NANOSHEETS, REDUCTION, NITROGEN, MOP, NANOSPHERES, GENERATION, ELECTRODES |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10062153 |
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