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      N,P-Codoped Carbon Layer Coupled with MoP Nanoparticles as an Efficient Electrocatalyst for Hydrogen Evolution Reaction

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          Abstract

          Efficient electrocatalyst plays a significant role on the development of hydrogen energy. In this work, an N,P-codoped carbon layer coupled with MoP nanoparticles (MoP/NPCs) was prepared through a facile high-temperature pyrolysis treatment. The obtained MoP/NPCs presented efficient activity for hydrogen evolution reaction (HER), with low onset potential of 90 mV, and a small Tafel slope (71 mV dec −1), as well as extraordinary stability in acidic electrolyte. This work provides a new facile strategy for the design and synthesis of sustainable and effective molybdenum-based electrocatalysts as alternatives to non-Pt catalysts for HER.

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          Tailoring the d-Band Centers Enables Co4 N Nanosheets To Be Highly Active for Hydrogen Evolution Catalysis

          Zhiyan Chen, Yao Song, Jinyan Cai … (2018)
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            Multifunctional Carbon-Based Metal-Free Electrocatalysts for Simultaneous Oxygen Reduction, Oxygen Evolution, and Hydrogen Evolution

            Liming Dai, Chuangang Hu (2017)
            Article 0 comments Cited 231 times – based on 0 reviews     Review now
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              Highly efficient hydrogen evolution from seawater by a low-cost and stable CoMoP@C electrocatalyst superior to Pt/C

              Yuan-Yuan Ma, Cai-Xia Wu, Xiao-Jia Feng … (2017)
              A low-cost CoMoP@C electrocatalyst exhibits high efficiency and stable HER performance superior to commercial 20% Pt/C, and can directly work in seawater for the HER with a Faradaic efficiency of 92.5%. The hydrogen evolution reaction (HER) based on water electrolysis is a promising strategy for hydrogen energy production, in which the key point is seeking low-cost, high efficiency and stable electrocatalysts. Currently, the most efficient electrocatalysts for the HER are Pt-based catalysts (especially commercial Pt/C), but the low abundance and high cost of Pt hinder their widespread application. Herein, we demonstrate that a cobalt molybdenum phosphide nanocrystal coated by a few-layer N-doped carbon shell (CoMoP@C) is an excellent substitute for the HER. CoMoP@C is prepared by a one-step pyrolysis method on a large scale with polyoxometalate (POM) as a molecular platform. The catalytic activity of CoMoP@C is close to that of commercial 20% Pt/C under pH = 0–1 conditions and superior to that of 20% Pt/C under pH = 2–14 conditions at high overpotential ( e.g. η > 240 mV at pH = 2.2). In real seawater, CoMoP@C exhibits stable HER performance with a high Faradaic efficiency (FE) of 92.5%, while the HER activity of 20% Pt/C dramatically decreases after 4 h. The remarkable HER performance of CoMoP@C should be attributed to the low free energy of H on the central CoMoP crystalline core and the multiple functions of the outer N-doped C shell (especially the strong H + absorption behavior). This work may provide new options for the design and preparation of promising HER electrocatalysts superior to Pt/C, which can be used directly in seawater.
              Article 0 comments Cited 206 times – based on 0 reviews     Review now
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                Author and article information

                Journal
                Journal ID (nlm-ta): Materials (Basel)
                Journal ID (iso-abbrev): Materials (Basel)
                Journal ID (publisher-id): materials
                Title: Materials
                Publisher: MDPI
                ISSN (Electronic): 1996-1944
                Publication date (Electronic): 30 July 2018
                Publication date Collection: August 2018
                Volume: 11
                Issue: 8
                Electronic Location Identifier: 1316
                Affiliations
                State Key Laboratory Base of Eco-chemical Engineering, College of Chemistry and Molecular Engineering, Qingdao University of Science & Technology, Qingdao 266042, China; qustwangshuai@ 123456qust.edu.cn (S.W.); 18753363755@ 123456163.com (J.W.); qustlipingest@ 123456163.com (P.L.)
                Author notes
                [* ]Correspondence: splswzx@ 123456qust.edu.cn (Z.W.); liuxien@ 123456qust.edu.cn (X.L.); Tel.: +86-187-6390-9193 (Z.W.); +86-139-6968-0591 (X.L.)
                Author information
                https://orcid.org/0000-0002-4947-0631
                Article
                Publisher ID: materials-11-01316
                DOI: 10.3390/ma11081316
                PMC ID: 6117796
                PubMed ID: 30061486
                SO-VID: 795f0891-7fb5-46a6-aabc-624e83c9c753
                Copyright © © 2018 by the authors.
                License:

                Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license ( http://creativecommons.org/licenses/by/4.0/).

                History
                Date received : 27 June 2018
                Date accepted : 27 July 2018
                Categories
                Subject: Article

                Keywords: electrocatalysts,hydrogen evolution reaction,carbon layer,molybdenum phosphide
                Data availability:
                Keywords: electrocatalysts, hydrogen evolution reaction, carbon layer, molybdenum phosphide

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