High active and easily prepared cobalt encapsulated in carbon nanotubes for hydrogen evolution reaction

Xiao, Yupeng; Wang, Wenju; Wu, Qiao

doi:10.1016/j.ijhydene.2019.12.018

Cited by 15 publications

(13 citation statements)

References 56 publications

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“…[ 24 ] Xiao et al encapsulated different transition metals M (M = Fe, Co, and Ni) in carbon nanotubes and then supported with CeO 2 support (M@CNT/CeO 2 ) to compare the catalytic activity of Fe, Co, and Ni for HER. [ 25 ] The results showed that the Co has a much higher activity for HER than Fe and Ni in M@CNT/CeO 2 , which is consistent with density functional theory (DFT) calculation results. Most recently, Kang et al prepared Co‐doped CeO 2 nanosheets by a thermal decomposition exfoliation method.…”

Section: Ceo2‐based Electrocatalystsupporting

confidence: 82%

A Review on Ceo₂‐Based Electrocatalyst and Photocatalyst in Energy Conversion

Song

Liang

et al. 2021

Adv Energy and Sustain Res

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The activation and conversion of small molecules (H2, O2, H2O, CO2, N2, CH3OH, and C2H5OH) in energy‐related systems has attracted researchers’ attentions around the world. The conversion of these molecules plays a key role in renewable energy storage and conversion systems, and for that, the electrocatalysis and photocatalysis processes are considered as clean and efficient strategies. Numerous materials are designed to promote the conversion process to satisfy the different requirements for efficiency and selectivity. Due to the flexible switching between Ce3+ and Ce4+ with rich oxygen defects, CeO2‐based materials display excellent performance in all the related reaction processes. Herein, the CeO2‐based electro(photo)catalysts according to different reactions are summarized. Specifically, the influence of material compositions, morphologies, and structures on catalytic performance is discussed, and the significant role of CeO2 is emphasized. Finally, several approaches are advocated to promote the development of CeO2‐based electro(photo)catalysis and accelerate their industrial application.

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Section: Ceo2‐based Electrocatalystsupporting

confidence: 82%

A Review on Ceo₂‐Based Electrocatalyst and Photocatalyst in Energy Conversion

Song

Liang

et al. 2021

Adv Energy and Sustain Res

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“…45 Moreover, CoP/CeO x -20:1 still shows the best electrocatalytic performance with the overpotential of 142 mV and the Tafel slope of 79.24 mV dec −1 , even using a carbon rod as a counter electrode (Figure S9 and Table S2). The optimal CoP/CeO x -20:1 catalyst possesses better catalytic performance in alkaline electrolyte with a low overpotential and Tafel slope that is superior to that of the Ce-doped CoMoP/MoP@C catalyst (188 mV, 72.2 mV dec −1 ), 46 hollow h-CoP@NC nanocage (196 mV), 47 CoSe 2 /a-CoP material (151 mV, 80 mV dec −1 ), 35 Co@Co−P@NPCNTs (160 mV, 65 mV dec −1 ), 48 Co@CNT/ CeO 2 (181 mV), 49 and Co/CeO 2 /Co 2 P/CoP@NC dodecahedron (195 mV). 50 Also, the performance of CoP/CeO x -20:1 is comparable to that of the CeO x /CoP@C catalyst (127 mV), 51 Ce-CoP catalyst (138 mV, 70 mV dec −1 ), 52 hollow CeO x /CoP heterostructure supported on a nickel foam (117 mV), 53 and G@Co-W-P catalyst (102.3 mV) 54 but inferior to that of the CoP•5CoMoP nanocage (72 mV), 55 F-CDs/CoP/ NF catalyst (16 mV), 56 CoP-CeO 2 /Ti catalyst (43 mV), 57 CeO 2 /CoS 2 /Ti (36 mV), and Ni 2 P-CeO 2 catalyst (η 20 = 84 mV) (Table S3).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Boosting Hydrogen Evolution Electrocatalysis via Regulating the Electronic Structure in a Crystalline–Amorphous CoP/CeO_x p–n Heterojunction

Song

Zhu

et al. 2022

ACS Appl. Mater. Interfaces

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The modulation of the electronic structure is the effective access to achieve highly active electrocatalysts for the hydrogen evolution reaction (HER). Transition-metal phosphide-based heterostructures are very promising in enhancing HER performance but the facile fabrication and an in-depth study of the catalytic mechanisms still remain a challenge. In this work, the catalytically inactive n-type CeO x is successfully combined with p-type CoP to form the CoP/CeO x heterojunction. The crystalline–amorphous CoP/CeO x heterojunction is fabricated by the phosphorization of predesigned Co(OH)2/CeO x via the as-developed reduction–hydrolysis strategy. The p–n CoP/CeO x heterojunction with a strong built-in potential of 1.38 V enables the regulation of the electronic structure of active CoP within the space–charge region to enhance its intrinsic activity and facilitate the electron transfer. The functional CeO x entity and the negatively charged CoP can promote the water dissociation and optimize H adsorption, synergistically boosting the electrocatalytic HER output. As expected, the heterostructured CoP/CeO x -20:1 with the optimal ratio of Co/Ce shows significantly improved HER activity and favorable kinetics (overpotential of 118 mV at a current density of 10 mA cm–2 and Tafel slope of 77.26 mV dec–1). The present study may provide new insight into the integration of crystalline and amorphous entities into the p–n heterojunction as a highly efficient electrocatalyst for energy storage and conversion.

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“…Xiao et al obtained a series of electrocatalysts (M@CNT/CeO 2 , M=Fe, Co, and Ni) via ethanol decomposition on as-prepared M/CeO 2 . [120] In this work, the experimental ethanol decomposition time was controlled to optimize the electrocatalytic HER output. Due to the presence of carbon nanotubes, Co/CeO 2 has excellent dispersion degree in them, and the metal structure is coated with thin carbon layer, which also greatly improves the stability of the catalyst.…”

Section: Ceo 2 /Metal Composite Catalysts For Hermentioning

confidence: 99%

“…Xiao et al. obtained a series of electrocatalysts (M@CNT/CeO 2 , M=Fe, Co, and Ni) via ethanol decomposition on as‐prepared M/CeO 2 [120] . In this work, the experimental ethanol decomposition time was controlled to optimize the electrocatalytic HER output.…”

Section: Application Of Ceo2‐based Electrocatalysts In Hermentioning

confidence: 99%

Recent Advances of CeO₂‐Based Electrocatalysts for Oxygen and Hydrogen Evolution as well as Nitrogen Reduction

2021

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wards the oxygen evolution reaction (OER), hydrogen evolution reaction (HER), and nitrogen reduction reaction (NRR) are summarized. This Review also highlights the key role of CeO 2 and the structural design strategies in the hybrid electrocatalysts, including ion doping, interface and defect engineering, electronic structure optimization, and morphology control for catalytic output enhancement. Lastly, some scientific challenges and perspectives have been proposed, aiming to promote the development of other CeO 2-based hybrids for energy related electrocatalysis.

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High active and easily prepared cobalt encapsulated in carbon nanotubes for hydrogen evolution reaction

Cited by 15 publications

References 56 publications

A Review on Ceo₂‐Based Electrocatalyst and Photocatalyst in Energy Conversion

A Review on Ceo₂‐Based Electrocatalyst and Photocatalyst in Energy Conversion

Boosting Hydrogen Evolution Electrocatalysis via Regulating the Electronic Structure in a Crystalline–Amorphous CoP/CeO_x p–n Heterojunction

Recent Advances of CeO₂‐Based Electrocatalysts for Oxygen and Hydrogen Evolution as well as Nitrogen Reduction

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High active and easily prepared cobalt encapsulated in carbon nanotubes for hydrogen evolution reaction

Cited by 15 publications

References 56 publications

A Review on Ceo2‐Based Electrocatalyst and Photocatalyst in Energy Conversion

A Review on Ceo2‐Based Electrocatalyst and Photocatalyst in Energy Conversion

Boosting Hydrogen Evolution Electrocatalysis via Regulating the Electronic Structure in a Crystalline–Amorphous CoP/CeOx p–n Heterojunction

Recent Advances of CeO2‐Based Electrocatalysts for Oxygen and Hydrogen Evolution as well as Nitrogen Reduction

Contact Info

Product

Resources

About

A Review on Ceo₂‐Based Electrocatalyst and Photocatalyst in Energy Conversion

A Review on Ceo₂‐Based Electrocatalyst and Photocatalyst in Energy Conversion

Boosting Hydrogen Evolution Electrocatalysis via Regulating the Electronic Structure in a Crystalline–Amorphous CoP/CeO_x p–n Heterojunction

Recent Advances of CeO₂‐Based Electrocatalysts for Oxygen and Hydrogen Evolution as well as Nitrogen Reduction