dc.contributor.author | Liu, Rongrong | |
dc.contributor.author | Zhang, Haimin | |
dc.contributor.author | Zhang, Xian | |
dc.contributor.author | Wu, Tianxing | |
dc.contributor.author | Zhao, Huijun | |
dc.contributor.author | Wang, Guozhong | |
dc.date.accessioned | 2017-08-03T02:31:08Z | |
dc.date.available | 2017-08-03T02:31:08Z | |
dc.date.issued | 2017 | |
dc.identifier.issn | 2046-2069 | |
dc.identifier.doi | 10.1039/c7ra01798g | |
dc.identifier.uri | http://hdl.handle.net/10072/343108 | |
dc.description.abstract | In this study, we first synthesized Co9S8@N-doped porous carbon (Co9S8@NC) using shrimp-shell derived carbon nanodots as a carbon/nitrogen source in the presence of CoSO4 by a one-step molten-salt calcination method. This was followed by low-temperature phosphorization in the presence of NaH2PO2, whereby Co9S8@N,P-doped porous carbon (Co9S8@NPC) was finally obtained using the Co9S8@NC as a precursor. The results demonstrated that the molten-salt calcination approach can effectively create a pyrolytic product with a porous structure and improve the material’s surface area, which is favourable for electrocatalysis-related mass transport and the exposure of catalytic active sites during electrocatalysis. As an electrocatalyst, Co9S8@NPC exhibits higher catalytic activity for the hydrogen evolution reaction (HER) than Co9S8@NC in an alkaline medium. Among all the investigated Co9S8@NPC catalysts, Co9S8@NPC-10 (mass ratio of NaH2PO2 to Co9S8@NC = 10 : 1) displays the best HER activity with an overpotential of 261 mV at 10 mA cm−2 in the alkaline medium. Interestingly, Co9S8@NPC-10 also displays good catalytic activity for the oxygen evolution reaction (OER) in this study. Owing to its bifunctional catalytic activity towards the HER and OER, the fabricated Co9S8@NPC-10 was simultaneously used as an anode and cathode material to generate O2 and H2 from overall water splitting in the alkaline medium, exhibiting a nearly 100% faradaic yield. This study would be helpful to the design and development of high performance non-precious metal electrocatalysts to be applied in overall water splitting to produce H2 and O2. | |
dc.description.peerreviewed | Yes | |
dc.language | English | |
dc.language.iso | eng | |
dc.publisher | Royal Society of Chemistry | |
dc.relation.ispartofpagefrom | 19181 | |
dc.relation.ispartofpageto | 19188 | |
dc.relation.ispartofissue | 31 | |
dc.relation.ispartofjournal | RSC Advances | |
dc.relation.ispartofvolume | 7 | |
dc.subject.fieldofresearch | Chemical sciences | |
dc.subject.fieldofresearch | Other chemical sciences not elsewhere classified | |
dc.subject.fieldofresearchcode | 34 | |
dc.subject.fieldofresearchcode | 349999 | |
dc.title | Co9S8@N,P-doped porous carbon electrocatalyst using biomass-derived carbon nanodots as a precursor for overall water splitting in alkaline media | |
dc.type | Journal article | |
dc.type.description | C1 - Articles | |
dc.type.code | C - Journal Articles | |
dcterms.license | https://creativecommons.org/licenses/by/3.0/ | |
dc.description.version | Version of Record (VoR) | |
gro.rights.copyright | © The Author(s) 2017. This is an Open Access article distributed under the terms of the Creative Commons Attribution 3.0 Unported (CC BY 3.0) License (http://creativecommons.org/licenses/by/3.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. | |
gro.hasfulltext | Full Text | |
gro.griffith.author | Zhao, Huijun | |