Template-assisted synthesis of CoP nanotubes to efficiently catalyze hydrogen-evolving reaction

Du, Hongfang; Liu, Qian; Cheng, Ningyan; Asiri, Abdullah M.; Sun, Xuping; Li, Chang Ming

doi:10.1039/c4ta02368d

Cited by 146 publications

(81 citation statements)

References 53 publications

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“…The performancestructure correlation is fully manifested in the study of Cu 3 P [ 18a ] and CoP [ 53 ] as catalysts for HER, where Cu 3 P NW/CF (nanowire grown on copper foam) outperforms Cu 3 P MF/CF (microparticles coated copper foam); [ 18a ] the CoP nanotubes (CoP NTs) outperforms CoP nanoparticles (CoP NPs). [ 53 ] Adopting the post-phosphidation approach, uniformly distributed nanosized phosphide can be obtained by incorporation of carbon materials, e.g., CoP decorated carbon nanotubes [ 54 ] ( Figure 7 a), CoP on rGO [ 55 ] / mesoporous carbon, [ 56 ] and Fe-doped Ni 2 P sandwiched by quasi-graphene. [ 57 ] Emphasis is given to the abundant active sites from the supported nanosized phosphide compared to its supportless counterpart.…”

Section: Wileyonlinelibrarycommentioning

confidence: 99%

A Review of Phosphide‐Based Materials for Electrocatalytic Hydrogen Evolution

Xiao

Chen

Wang

2015

Advanced Energy Materials

765

425

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for HER when nanoscale MoS 2 is used, [ 1 ] albeit bulk MoS 2 is suggested to be inactive towards HER. [ 2 ] Thus most studies have focused on designing thin layered/nanostructured MoS 2 nanomaterials with most exposed edges for HER. To this end, amorphous MoS 2,[ 3 ] MoS x nanosheets [ 4 ] were found to outperform bulk MoS 2 signifi cantly; layer-dependent attributes, [ 5 ] the correlation with intrinsic low conductivity out-of-plane, and phasedetermined performance have also been studied. [ 6 ] These fi ndings have stimulated the work of sulfi de of earth-abundant metals, e.g., WS 2 [ 7 ] and its analogues, selenides, [ 8 ] resulting in a big family of chalcogenides of fi rst-row transition metals. [ 9 ] Reviews [ 6b , 7c , 10 ] have been conducted from different perspectives and can be referred to accordingly. Unfortunately, the best performing MoS 2 catalyst still lacks the competitiveness of Pt. Furthermore, improvements in performance relies heavily on the basis that moly bdenum/tungsten chalcogenides (sulfi de, selenide) are nanostructured with abundant S-edges and are thin layered (preferable single layer). These requirements may severely constrain their application in large-scale production. Thus, it is imperative to continue the search for new inexpensive catalysts that can rival the performance of Pt while being suitable for large-scale hydrogen production.It was only recently discovered that hydrogen evolution proceeds via a similar pathway to that of hydrogenation (hydrotreating process), e.g., hydrodesulfurization (HDS), where a reversible ad/desorption of hydrogen on catalyst is critical for achieving fast kinetics. This correlation broadens the scope of search for new catalysts. Hence, phosphides, previously employed as catalysts for HDS, were found to be active towards HER, e.g., Ni 2 P [ 11 ] has been reported to achieve a better performance than the state-of-the-art MoS 2 .[ 11c ] This pivotal work [ 11c ] was followed by a variety of studies applying phosphide as catalysts for HER. This class of electrocatalyst with superb electrocatalytic activities has thus opened up a new avenue in the search of non-noble metal catalysts for HER. Here, we focus our discussion on the recent developments of synthesis methodology of phosphides for HER. Based on different synthetic routes of phosphides, we then make a comparative survey of their activities, which are evaluated in terms of experimental metrics of over-potential ( η ) at a certain current density ( j ), Tafel slope coupled with exchange current density ( j o ) extrapolated from the plot of η vs. Log 10 ( j ), and turnover frequency (TOF). In conjunction with experimental results, Hydrogen evolution by means of electrocatalytic water-splitting is pivotal for effi cient and economical production of hydrogen, which relies on the development of inexpensive, highly active catalysts. In addition to sulfi des, the search for non-noble metal catalysts has been mainly directed at phosphides due to the superb activity of phosphides for hydrogen ev...

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Section: Wileyonlinelibrarycommentioning

confidence: 99%

A Review of Phosphide‐Based Materials for Electrocatalytic Hydrogen Evolution

Xiao

Chen

Wang

2015

Advanced Energy Materials

765

425

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“…Indeed, comparable HER activity has been observed by several groups for CoP materials that span a range of morphologies, synthetic protocols, accessible surface areas, and support materials. [4][5][6][7][8][9][10][11] A key nding of this work is that the activities are largely the same, regardless of morphology or preparation method, underscoring the high intrinsic activity of CoP. The intrinsic HER activity of CoP makes it a highly viable candidate for practical applications, regardless , along with Ti foil and Pt mesh electrodes for comparison.…”

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confidence: 91%

Highly branched cobalt phosphide nanostructures for hydrogen-evolution electrocatalysis

et al. 2015

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“…Similar to Ni 2 P and MoS 2 catalysts, CoP is also known to be active for both hydrodesulphurization and hydrogen evolution reactions [46][47][48][49]. Various types of CoP catalysts have been reported including single-crystalline hollow CoP nanoparticles on Ti foil [46], electrochemically deposited CoP films [50], CoP nanocrystals on carbon nanotube or glassy carbon electrodes [47], porous CoP nanowires on carbon cloth [48], CoP nanosheets on a Ti plate [51], and porous template-grown CoP nanowires [52]. Although the CoP catalysts have been extensively studied in water-splitting, the Tafel slope for HER reported so far ranges from 43 mV/dec to 105 mV/dec (See supporting Table S1 for details).…”

Section: Introductionmentioning

confidence: 98%

CoP nanosheet assembly grown on carbon cloth: A highly efficient electrocatalyst for hydrogen generation

et al. 2015

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Template-assisted synthesis of CoP nanotubes to efficiently catalyze hydrogen-evolving reaction

Abstract: CoP nanotubes were fabricated by phosphidation of Co salt inside an anodic aluminum oxide template as an efficient hydrogen-evolving electrocatalysts.

Cited by 146 publications

References 53 publications

A Review of Phosphide‐Based Materials for Electrocatalytic Hydrogen Evolution

A Review of Phosphide‐Based Materials for Electrocatalytic Hydrogen Evolution

Highly branched cobalt phosphide nanostructures for hydrogen-evolution electrocatalysis

CoP nanosheet assembly grown on carbon cloth: A highly efficient electrocatalyst for hydrogen generation

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