Single atoms (Pt, Ir and Rh) anchored on activated NiCo LDH for alkaline hydrogen evolution reaction

Fan, Binbin; Wang, Haozhi; Han, Xiaopeng; Deng, Yida; Hu, Wenbin

doi:10.1039/d2cc02732a

Cited by 31 publications

(17 citation statements)

References 26 publications

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“…As evidenced by the Tafel slope in the HER, 2H* → 2* + H 2 was the rate-determining step, so we calculated the free energy of H adsorption (Δ G H *) (Figure C). In previous works, Ni and Ir species often acted as the active sites in the HER; , hence, the adsorption configurations of H* on Ni and Ir were calculated, respectively (Figure S15). For NiIr SAA -NiFe-LDH, the Δ G value of H* absorbed on Ir was calculated to be −1.52 eV, which was higher than that of H* absorbed on Ni (−0.17 eV).…”

Section: Resultsmentioning

confidence: 99%

Atomic Modulation of Single Dispersed Ir Species on Self-Supported NiFe Layered Double Hydroxides for Efficient Electrocatalytic Overall Water Splitting

Shen

Song

et al. 2023

ACS Catal.

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Electrocatalytic overall water splitting is a promising approach for hydrogen production, and the rational design of the catalyst on the atomic level is critical for decreasing the energy barrier in both hydrogen and oxygen evolution reactions (HER/OER). Herein, we report an NiIr single atom alloy loaded NiFe-LDH (NiIrSAA-NiFe-LDH) and Ir single atom loaded NiFe-LDH (IrSAC-NiFe-LDH) for overall water splitting. The Ir single atoms are found via EXAFS fitting and DFT calculations to be located on the top of Fe3+ with Ir–O6 coordination on IrSAC-NiFe-LDH. The as-prepared NiIrSAA-NiFe-LDH presents an overpotential of 28.5 mV at 10 mA cm–2 in the HER and IrSAC-NiFe-LDH exhibits an overpotential of 194 mV at 10 mA cm–2 in the OER, respectively. Moreover, the electrolyzer assembled by NiIrSAA-NiFe-LDH and IrSAC-NiFe-LDH presents a low cell voltage of 1.49 V at 10 mA cm–2 and a long-term stability of over 120 h at 200 mA cm–2 in overall water splitting with an estimated cost of US $1.12 per kilogram of H2, meeting the target raised by the US Department of Energy (

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Section: Resultsmentioning

confidence: 99%

Atomic Modulation of Single Dispersed Ir Species on Self-Supported NiFe Layered Double Hydroxides for Efficient Electrocatalytic Overall Water Splitting

Shen

Song

et al. 2023

ACS Catal.

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“…At present, the rational design of advanced HER electrocatalysts should consider the two points of the dissociation of water molecules and the H* adsorption energy. Nowadays, the precious metal doping strategy has been widely applied in constructing excellent electrocatalysts in water splitting [ 33 , 34 , 35 ], which can form the optimized catalyst sites with the best free energy profile, thus leading to an ultrahigh mass activity based on precious metals.…”

Section: Heteroatom Doping Strategymentioning

confidence: 99%

Recent Advances of Modified Ni (Co, Fe)-Based LDH 2D Materials for Water Splitting

Bao

Liu

et al. 2023

Molecules

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Water splitting technology is an efficient approach to produce hydrogen (H2) as an energy carrier, which can address the problems of environmental deterioration and energy shortage well, as well as establishment of a clean and sustainable hydrogen economy powered by renewable energy sources due to the green reaction of H2 with O2. The efficiency of H2 production by water splitting technology is intimately related with the reactions on the electrode. Nowadays, the efficient electrocatalysts in water splitting reactions are the precious metal-based materials, i.e., Pt/C, RuO2, and IrO2. Ni (Co, Fe)-based layered double hydroxides (LDH) two-dimensional (2D) materials are the typical non-precious metal-based materials in water splitting with their advantages including low cost, excellent electrocatalytic performance, and simple preparation methods. They exhibit great potential for the substitution of precious metal-based materials. This review summarizes the recent progress of Ni (Co, Fe)-based LDH 2D materials for water splitting, and mainly focuses on discussing and analyzing the different strategies for modifying LDH materials towards high electrocatalytic performance. We also discuss recent achievements, including their electronic structure, electrocatalytic performance, catalytic center, preparation process, and catalytic mechanism. Furthermore, the characterization progress in revealing the electronic structure and catalytic mechanism of LDH is highlighted in this review. Finally, we put forward some future perspectives relating to design and explore advanced LDH catalysts in water splitting.

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“…At present, rational design of advanced HER electrocatalysts should consider from two points of the dissociation of water molecules and H* adsorption energy. Nowadays, precious metal doping strategy has been widely applied in constructing excellent electrocatalysts in water splitting [33][34][35], which can form the optimized catalysts sites with a best free energy profile, thus leading to an ultrahigh mass activity-based on precious metals.…”

Section: Precious Metal Dopingmentioning

confidence: 99%

Recent Advances of Modified Ni (Co, Fe)-based LDH 2D Materials for Water Splitting

Li¹,

Bao²,

Liu³

et al. 2023

Preprint

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Water splitting technology is an efficient approach to generate hydrogen (H2) energy, which can well address the problems of environmental deterioration and energy shortage, as well as establishment of a clean and sustainable hydrogen economy powered by renewable energy sources due to the green reaction of H2 with O2. While the efficiency of H2 production by water splitting technology is intimately related with the reactions on electrode. Nowadays, the efficient electrocatalysts in water splitting reactions are the precious metal-based materials, i.e., Pt/C, RuO2 and IrO2. Ni (Co, Fe)-based layered double hydroxides (LDH) 2D materials are the typical non-precious metal-based materials in water splitting with advantages of low cost, excellent electrocatalytic performance and simple preparation methods, which exhibits a great potential for the substitution for precious metal-based materials. This review summarizes the recent progress of Ni (Co, Fe)-based LDH 2D materials for water splitting, which mainly focuses on discussing and analyzing the different strategies to modify LDH materials towards high electrocatalytic performance. We also discuss the recent achievements including their electronic structure, electrocatalytic performance, catalytic center, preparation process and catalytic mechanism. Furthermore, the characterization progress in revealing electronic structure and catalytic mechanism of LDH is highlighted in this review. Finally, we put forward some future perspectives related to design and explore advanced LDH catalysts in water splitting.

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Single atoms (Pt, Ir and Rh) anchored on activated NiCo LDH for alkaline hydrogen evolution reaction

Abstract: Here, we report the synthesis of activated NiCo LDH to immobilize Pt, Ir and Rh single atoms for hydrogen evolution reaction. The Pt/A-NiCo LDH electrocatalyst exhibits the highest catalytic ability...

Cited by 31 publications

References 26 publications

Atomic Modulation of Single Dispersed Ir Species on Self-Supported NiFe Layered Double Hydroxides for Efficient Electrocatalytic Overall Water Splitting

Atomic Modulation of Single Dispersed Ir Species on Self-Supported NiFe Layered Double Hydroxides for Efficient Electrocatalytic Overall Water Splitting

Recent Advances of Modified Ni (Co, Fe)-Based LDH 2D Materials for Water Splitting

Recent Advances of Modified Ni (Co, Fe)-based LDH 2D Materials for Water Splitting

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