Recent progress in transition metal phosphides with enhanced electrocatalysis for hydrogen evolution

Du, Huitong; Kong, Rongmei; Guo, Xiaoxi; Qu, Fengli; Li, Jinghong

doi:10.1039/c8nr07891b

Cited by 339 publications

(160 citation statements)

References 74 publications

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“…High‐cost and less‐abundant catalysts such as Ir and Ru oxides show state‐of‐the‐art activity towards OER, while Pt is most efficient HER catalyst known to date . There are many reports of cost‐effective HER catalysts, few of those being pH‐universal . The dearth of a Pt‐like activity is still hovering.…”

Section: Introductionmentioning

confidence: 99%

Tweaking Nickel with Minimal Silver in a Heterogeneous Alloy of Decahedral Geometry to Deliver Platinum‐like Hydrogen Evolution Activity

et al. 2020

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Five‐fold intertwined AgxNi1−x (x=0.01–0.25) heterogeneous alloy nanocrystal (NC) catalysts, prepared through unique reagent combinations, are presented. With only ca. 5 at % Ag (AgNi‐5), Pt‐like activity has been achieved at pH 14. To reach a current density of 10 mA cm−2 the extremely stable AgNi‐5 requires an overpotential of 24.0±1.2 mV as compared to 20.1±0.8 mV for 20 % Pt/C, both with equal catalyst loading of 1.32 mg cm−2. The turnover frequency (TOF) is as high as 2.1 H2 s−1 at 50 mV (vs. RHE). Site‐specific elemental analyses show the Ag:Ni compositional variation, where the apex and edges of the decahedra are Ag‐rich, thereby exposing Ni onto the faces to achieve maximum charge transport for an exceptional pH universal HER activity. DFT calculations elucidate the relative H‐atom adsorption capability of the Ni centers as a function of their proximity to Ag atom.

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Section: Introductionmentioning

confidence: 99%

Tweaking Nickel with Minimal Silver in a Heterogeneous Alloy of Decahedral Geometry to Deliver Platinum‐like Hydrogen Evolution Activity

et al. 2020

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Section: Introductionmentioning

confidence: 99%

Tweaking Nickel with Minimal Silver in a Heterogeneous Alloy of Decahedral Geometry to Deliver Platinum‐like Hydrogen Evolution Activity

et al. 2020

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Five-fold intertwined Ag x Ni 1Àx (x = 0.01-0.25) heterogeneous alloynanocrystal (NC) catalysts,prepared through unique reagent combinations,a re presented. With only ca. 5at% Ag (AgNi-5), Pt-like activity has been achieved at pH 14. To reachacurrent density of 10 mA cm À2 the extremely stable AgNi-5 requires an overpotential of 24.0 AE 1.2 mV as compared to 20.1 AE 0.8 mV for 20 %P t/C,b oth with equal catalyst loading of 1.32 mg cm À2 .T he turnover frequency (TOF) is as high as 2.1 H 2 s À1 at 50 mV (vs.R HE). Sitespecific elemental analyses show the Ag:Ni compositional variation, where the apex and edges of the decahedra are Agrich, therebye xposing Ni onto the faces to achieve maximum charge transport for an exceptional pH universal HER activity. DFT calculations elucidate the relative H-atom adsorption capability of the Ni centers as af unction of their proximity to Ag atom.

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“…[26] Recently, various polymorphs of cobalt phosphide have been extensively investigated as promising hydrogen evolution reaction (HER) electrocatalysts in alkaline, neutral and acidic solutions. [27][28][29][30][31][32][33][34][35] Meanwhile, limited number of nanostructured cobalt phosphide-based electrocatalysts, such as CoP nanorods, [36] CoP nanosheets/C, [37] CoP nanosheets, [22] CoP polyhedrons, [38] Phosphate modified CoP nanorods, [39] CoP/CoP 2 nanoparticles, [40] hollow CoP nanoparticles/N doped graphene, [41] Ni 1-x Co x P yolk-shell spheres, [42] etc. have been demonstrated to possess a satisfying OER activity in alkaline solution.…”

Section: Introductionmentioning

confidence: 99%

Cobalt Phosphide Ultrathin and Freestanding Sheets Prepared through Microwave Chemical Vapor Deposition: A Highly Efficient Oxygen Evolution Reaction Catalyst

et al. 2019

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The oxygen evolution reaction (OER) is the prime barrier for many appealing energy conversion and storage technologies, including water electrolysis, metal-air batteries, and fuel cells. Therefore, developing a cost-effective, efficient, and robust OER catalyst is still a challenge. Herein, we report a fast, low-cost, and gram-scale approach to overcome the synthesis of freestanding, ultrathin (ca. 1.3 nm), and mesoporous CoP sheets through the microwave-assisted growth of a cobalt-layered double hydroxide (Co-LDH) precursor coupled with chemical vapor deposition. The present 2D nanostructure not only guarantees a rich surface of active sites, but also promotes the charge and mass transfers due to the ultrathin and mesoporous features that allow it to efficiently perform the OER. It was found that the surface of the CoP sheets was oxidized in situ under the catalytic conditions, suggesting that Co 3 O 4 /CoP is effectively the active form of the catalyst, thereby modulating the electronic structure of Co atoms (active centers). This was embodied by the lowering of the Co-LDH's required overpotential to achieve 10 mA cm À 2 (η 10 ) from 296 to 265 mV and the Tafel slope decrease from 75 to 63 mV dec À 1 upon phosphorization. Such performances of CoP nanosheets are remarkably superior to those of commercial RuO 2 and compare favorably to the best values reported for noble-metal-free OER electrocatalysts.

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Recent progress in transition metal phosphides with enhanced electrocatalysis for hydrogen evolution

Abstract: The latest advances and perspectives in the development of TMP-based catalysts with enhanced electrocatalysis for hydrogen evolution.

Cited by 339 publications

References 74 publications

Tweaking Nickel with Minimal Silver in a Heterogeneous Alloy of Decahedral Geometry to Deliver Platinum‐like Hydrogen Evolution Activity

Tweaking Nickel with Minimal Silver in a Heterogeneous Alloy of Decahedral Geometry to Deliver Platinum‐like Hydrogen Evolution Activity

Tweaking Nickel with Minimal Silver in a Heterogeneous Alloy of Decahedral Geometry to Deliver Platinum‐like Hydrogen Evolution Activity

Cobalt Phosphide Ultrathin and Freestanding Sheets Prepared through Microwave Chemical Vapor Deposition: A Highly Efficient Oxygen Evolution Reaction Catalyst

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