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Porous coordination polymer-derived ultrasmall CoP encapsulated in nitrogen-doped carbon for efficient hydrogen evolution in both acidic and basic media

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Title: Porous coordination polymer-derived ultrasmall CoP encapsulated in nitrogen-doped carbon for efficient hydrogen evolution in both acidic and basic media
Authors: Mingdong Dong, Zegao Wang, Shuai Liu, Qiang Li, Anning Jiang, Dan Xia, Mengxia Lin
Source: Liu, S, Jiang, A, Wang, Z, Lin, M, Xia, D, Li, Q & Dong, M 2020, 'Porous coordination polymer-derived ultrasmall CoP encapsulated in nitrogen-doped carbon for efficient hydrogen evolution in both acidic and basic media', International Journal of Hydrogen Energy, vol. 45, no. 3, pp. 1729-1737. https://doi.org/10.1016/j.ijhydene.2019.11.063
Publisher Information: Elsevier BV, 2020.
Publication Year: 2020
Subject Terms: Porous coordination polymer, Cobalt phosphide, Electrocatalyst, Hydrogen evolution reaction, 7. Clean energy, 01 natural sciences, Nitrogen-doped graphitic carbon layer, 0104 chemical sciences
Description: Exploiting high-efficient and stable non-precious metal-based electrocatalysts toward hydrogen evolution reaction (HER) is of enormous significance to address the shortage of global power source, but there remain major challenges. Here we present a facile and controllable strategy to synthesize a strongly coupled ultrasmall-cobalt phosphide/nitrogen-doped graphitic carbon (u-CoP@NC) hybrid structure via phosphorization from a porous coordination polymer (PCP) precursor. The PCP-derived u-CoP@NC exhibits remarkable activity and stability for HER, achieving a current density of 10 mA cm−2 with a low overpotential of 131 mV in acidic media and 111 mV in basic media. The corresponding Tafel slopes present in acidic and basic media are 62.7 and 70.3 mV dec−1, respectively. Results reveal that the enhanced electrocatalytic performance of u-CoP@NC originates from the strongly coupled u-CoP nanoparticles and graphitic carbon layer, and the perfect dispersity of the active sites. This research opens up new avenues for designing earth-abundant metal-based electrocatalysts with high capability for water splitting applications.
Document Type: Article
Language: English
ISSN: 0360-3199
DOI: 10.1016/j.ijhydene.2019.11.063
Access URL: https://www.sciencedirect.com/science/article/pii/S0360319919342442
https://pure.au.dk/portal/en/publications/c7f6456a-49ca-412a-b7f9-eab9b61184b1
http://www.scopus.com/inward/record.url?scp=85076453697&partnerID=8YFLogxK
https://doi.org/10.1016/j.ijhydene.2019.11.063
Rights: Elsevier TDM
Accession Number: edsair.doi.dedup.....a2e3372e15eb384fe00ce03b9f7ff7c6
Database: OpenAIRE
Description
Abstract:Exploiting high-efficient and stable non-precious metal-based electrocatalysts toward hydrogen evolution reaction (HER) is of enormous significance to address the shortage of global power source, but there remain major challenges. Here we present a facile and controllable strategy to synthesize a strongly coupled ultrasmall-cobalt phosphide/nitrogen-doped graphitic carbon (u-CoP@NC) hybrid structure via phosphorization from a porous coordination polymer (PCP) precursor. The PCP-derived u-CoP@NC exhibits remarkable activity and stability for HER, achieving a current density of 10 mA cm−2 with a low overpotential of 131 mV in acidic media and 111 mV in basic media. The corresponding Tafel slopes present in acidic and basic media are 62.7 and 70.3 mV dec−1, respectively. Results reveal that the enhanced electrocatalytic performance of u-CoP@NC originates from the strongly coupled u-CoP nanoparticles and graphitic carbon layer, and the perfect dispersity of the active sites. This research opens up new avenues for designing earth-abundant metal-based electrocatalysts with high capability for water splitting applications.
ISSN:03603199
DOI:10.1016/j.ijhydene.2019.11.063