dc.contributor.author | Chen, Binling | |
dc.contributor.author | Li, Rong | |
dc.contributor.author | Ma, Guiping | |
dc.contributor.author | Gou, Xinglong | |
dc.contributor.author | Zhu, Yanqiu | |
dc.contributor.author | Xia, Yongde | |
dc.date.accessioned | 2016-02-04T12:23:43Z | |
dc.date.issued | 2015-12-28 | |
dc.description.abstract | Exploring highly-efficient and low-cost bifunctional electrocatalysts for both oxygen reduction reaction (ORR) and oxygen evolution reactions (OER) in the renewable energy area has gained momentum but still remains a significant challenge. Here we present a simple but efficient method that utilizes ZIF-67 as the precursor and template for the one-step generation of homogeneous dispersed cobalt sulfide/N,S-codoped porous carbon nanocomposites as high-performance electrocatalysts. Due to the favourable molecular-like structural features and uniform dispersed active sites in the precursor, the resulting nanocomposites, possessing a unique core-shell structure, high porosity, homogeneous dispersion of active components together with N and S-doping effects, not only show excellent electrocatalytic activity towards ORR with the high onset potential (around -0.04 V vs.-0.02 V for the benchmark Pt/C catalyst) and four-electron pathway and OER with a small overpotential of 0.47 V for 10 mA cm(-2) current density, but also exhibit superior stability (92%) to the commercial Pt/C catalyst (74%) in ORR and promising OER stability (80%) with good methanol tolerance. Our findings suggest that the transition metal sulfide-porous carbon nanocomposites derived from the one-step simultaneous sulfurization and carbonization of zeolitic imidazolate frameworks are excellent alternative bifunctional electrocatalysts towards ORR and OER in the next generation of energy storage and conversion technologies. | en_GB |
dc.description.sponsorship | Royal Society | en_GB |
dc.description.sponsorship | Royal Academy of Engineering | en_GB |
dc.identifier.citation | Vol. 7, pp. 20674 - 20684 | en_GB |
dc.identifier.doi | 10.1039/c5nr07429k | |
dc.identifier.uri | http://hdl.handle.net/10871/19598 | |
dc.language.iso | en | en_GB |
dc.publisher | Royal Society of Chemistry | en_GB |
dc.relation.url | http://www.ncbi.nlm.nih.gov/pubmed/26599403 | en_GB |
dc.rights.embargoreason | Publisher Policy | en_GB |
dc.title | Cobalt sulfide/N,S codoped porous carbon core-shell nanocomposites as superior bifunctional electrocatalysts for oxygen reduction and evolution reactions. | en_GB |
dc.type | Article | en_GB |
dc.identifier.issn | 2040-3364 | |
exeter.place-of-publication | England | |
dc.description | Author's postprint version. The final published version is available via doi: 10.1039/C5NR07429K | en_GB |
dc.description | Accepted for publication 11 November 2015 | en_GB |
dc.description | © Royal Society of Chemistry 2015 | en_GB |
dc.identifier.journal | Nanoscale | en_GB |
dc.identifier.pmid | 26599403 | |