Catalysts
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2026
·Vol. 16
·期 2
·152
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IF 4.5
Pengfei Sha,Zhi Ling,Kaifa Liu,Di Chen,Beili Pang,Fengying Yan,Jing Sui,Qian Zhang,Jianhua Yu,Liyan Yu,Lifeng Dong
The rational design and synthesis of efficient and durable bifunctional electrocatalysts for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is of great significance and challenging for rechargeable zinc–air batteries. While much attention has been devoted to enhancing ORR performance in recent studies, the effectiveness of OER is equally crucial for charging performance of Zn–air batteries. In this work, NH2-MIL-101(Fe) is employed as a precursor to derive Fe-NC through a straightforward pyrolysis method. Subsequently, NiFe-LDH is synthesized on the surface of Fe-NC via a wet-chemical process to obtain Fe-NC@NiFe-LDH. Capitalizing on the synergistic interplay between Fe-NC, serving as the ORR active site, and NiFe-LDH, acting as the OER active site, Fe-NC@NiFe-LDH demonstrates remarkable bifunctional electrocatalytic performance, boasting a positive half-wave potential of 0.83 V for ORR and a low potential of 1.68 V for OER at a current density of 10 mA cm−2, alongside exceptional stability in alkaline environments. Furthermore, the Fe-NC@NiFe-LDH-based Zn–air battery exhibits outstanding discharge and charge performance, maintaining excellent cycling stability over 600 h (3600 cycles).
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2022
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IF 9.965
Yonghao Gan,Ying Ye,Xiaoping Dai,Xueli Yin,Yihua Cao,Run Cai,Xin Zhang
Exploring high-efficiency electrocatalysts for oxygen evolution reaction (OER) is one of the most important concerns to produce hydrogen in water electrolysis. Herein, the FNM/Co 2 P-0.4 heterostructure was designed as an electrocatalyst for the OER process by the combination of MoO 4 2− intercalating NiFe LDH and Co 2 P on nickel foam (NF). The surface reconstruction and MoO 4 2− leaching can induce the conversion of Co 2 P and NiFe LDH on FNM/Co 2 P-0.4 to generate Co/NiOOH with more oxygen vacancies. Beyond, CoOOH and NiOOH can also synergize to reduce the energy barrier of OER, optimize conductivity, and improve stability. The surface reconstruction and the formation of OOH ⁎ were further unveiled by in-situ UV–vis absorption spectra and Fourier-transformed alternative current voltammetry ( FTACV). The integration of interfacial synergies and oxygen vacancies can facilitate the adsorption/desorption of intermediates, regulate the d-band center, and expose more active sites. And as a result, FNM/Co 2 P-0.4 shows a significant low overpotential (240 mV) at 50 mA cm −2 , a small Tafel (74 mV dec −1 ), low activation energy ( E a ) and remarkable durability. This work provides a new pathway to improve the OER performance by using interfacial synergies and rich oxygen vacancies derived from the self-sacrificial reconstruction of heterostructured electrocatalysts.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
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2019
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IF 4.084
Maoxiao He,Shengnan Hu,Chuanqi Feng,Huimin Wu,Huakun Liu,He Mei
In targeting the most important energy and environmental issues in current society, the development of low-cost, bifunctional electrocatalysts for urea-assisted electrocatalytic hydrogen (H 2 ) production is an urgent and challenging task. In this work, interlaced rosette-like MoS 2 /Ni 3 S 2 /NiFe-layered double hydroxide/nickel foam (LDH/NF) is successfully synthesized by a two-step hydrothermal reaction . Due to its unique interlaced heterostructure , MoS 2 /Ni 3 S 2 /NiFe-LDH/NF exhibits excellent bifunctional catalytic activity towards the urea oxidation reaction (UOR) and the hydrogen evolution reaction (HER) in 1.0 M KOH with 0.5 M urea. In a concurrent two-electrode electrolyser (MoS 2 /Ni 3 S 2 /NiFe-LDH/NF(+,-)), only voltage of 1.343 V is required to reach 50 mA cm −2 , which is 216 mV lower than for pure water splitting. Furthermore, after 16 h of urea electrolysis in 1.0 M KOH with 0.5 M urea, the current density remains at 98% of the original value. Thus, the catalyst is not only favorable for H 2 production, but also has great significance for the problem of urea-rich wastewater treatment .
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Sen Qiao,Chaoming Rao,Haiyan Chen,Min Xiong,Qiuhua Xu,Suqin Ci
The construction of crystalline-amorphous coupling structure is one of the effective strategies to enhance the performance of oxygen evolution reaction (OER) and urea oxidation reaction (UOR). Herein, NiFe-LDH/NiMoO 4 /NF with high oxygen evolution and urea oxidation performance was successfully prepared by electrodeposition of amorphous substances on the crystalline precursor of hydrothermal synthesis. Remarkably, the NiFe-LDH/NiMoO 4 /NF displays exceptional electrocatalytic performance for OER and UOR, with a potential of only 1.57 V vs. RHE at 100 mA cm −2 and the Tafel slope of 54.4 mV dec −1 for OER, high UOR activity with a potential of 1.45 mV@100 mA cm −2 and the Tafel slope of 20.4 mV dec −1 in 1.0 M KOH with 0.33 M urea solution. In a hybrid acid-base electrolysis system for urea oxidation-assisted H 2 production using NiFe-LDH/NiMoO 4 /NF as the anode electrode and Pt/C/NF as the cathode electrode, the process requires a cell voltage of only 0.55 V vs . RHE at 10 mA cm −2 . Moreover, this hybrid acid/base system demonstrates stable operation for 110 h with minimal attenuation at a current density of 100 mA cm −2 . These results indicate a facile strategy for the design of electrodes with crystalline-amorphous coupling structures for energy conversion.
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JOURNAL OF HAZARDOUS MATERIALS
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2024
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IF 12.2
Yuan Wang,Haihong Zhong,Qianqian Xu,Miao Dong,Jianxin Yang,Weiting Yang,Yongjun Feng,Zhong-Min Su
Electrochemically upcycling polyvinyl chloride (PVC) into high-value small molecules represents a sustainable strategy for mitigating plastic pollution. Herein, a cost-effective self-supporting electrode with abundant vacancies, i.e. , NiFe-layered double hydroxide nanoarrays in-situ grown on the surface of carbon paper (denoted as NiFe V -LDH/CP), is developed for the electro-Fenton degradation of PVC microplastics (MPs). The NiFe V -LDH catalyst shows a high selectivity of 76 % towards H 2 O 2 production via two-electron oxygen reduction reaction (2e - ORR). Density functional theory (DFT) calculations reveal that the energy barrier of rate-determining step (*H 2 O 2 desorption) decreases over the vacancy-enriched NiFe V -LDH related to the pristine NiFeZn-LDH. The influence of vacancy concentration, reaction temperature and initial concentration of PVC MPs were systematically investigated. Under optimized conditions, the NiFe V -LDH/CP electrode exhibits an outstanding degradation performance of PVC MPs via direct cathodic reduction and oxidation by hydroxyl radicals. This work demonstrates that the electro-Fenton technology using LDH-based self-supporting electrodes is a promising and environmentally-friendly approach for waste plastic treatment.
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ACS Applied Materials & Interfaces
·
2025
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IF 8.2
Lipeng Zhang,Qingqing Lv,Yang Wang,Yufeng Zhang,Yongsheng Wang,Chengjin Chen,Haiyong Wang,Wei Zhu,Zhongbin Zhuang
The development of oxygen evolution reaction (OER) catalysts based on non-noble metals that have high catalytic activity and long-term stability is crucial for the use of an anion exchange membrane water electrolyzer (AEMWE). Here, we report a three-layer composite OER catalyst, NiFe-LDH/CoPi/NF, with the cobalt phosphate (CoPi) interlayer in the middle of nickel foam and a NiFe-LDH nanosheet array. The CoPi interlayer significantly improves the OER catalytic activity as well as the stability. The overpotential required for NiFe-LDH/CoPi/NF to achieve an OER current density of 1000 mA·cm–2 is only 277 mV, and the performance has almost no attenuation for 1000 h of continuous working at 1000 mA·cm–2. The AEMWE using NiFe-LDH/CoPi/NF as an anode reached a current density of 1 A·cm–2 at the cell voltage of only 1.709 V, and it stably operated up to 1200 h. It is found that the CoPi interlayer modulated the morphology of the NiFe-LDH nanosheet arrays and also tuned the electronic structure of the NiFe-LDH. The Ni in NiFe-LDH/CoPi/NF shows a higher valence state, thereby promoting its activity, and also shows a low dissolution rate, thereby promoting its stability.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2026
·
IF 6.7
Zhenyu Wang,Bo Li,Peng Sun,Binhui Mao,Xinqiang Mao,Jingjie Dai,Zonghua Wang
Efficient generation, transport, and utilization of plasmon-induced hot carriers remain fundamental challenges in the development of photoresponsive electrocatalysts. Herein, a hierarchical Au nanoparticle (NP)-decorated NiFe layered double hydroxide/Ni(TCNQ) 2 heterostructure supported on copper foam (Au NPs–NiFe LDH–Ni(TCNQ) 2 /CF) with a rationally designed conductive Ni(TCNQ) 2 interlayer is engineered, and the Au NPs size is systematically optimized to maximize plasmon-enhanced electrocatalytic performance. The conductive Ni(TCNQ) 2 nanorods serve as both electron-transport pathways and structural scaffolds enabling the growth of ultrathin NiFe LDH nanosheets, while plasmonic Au NPs enable light-driven electronic modulation. The integration of these components establishes efficient pathways for charge generation, separation, and transfer, thereby improving the utilization efficiency of plasmon-generated carriers. Notably, a systematic size-dependent investigation identifies 5-nm Au NPs as the optimal plasmonic configuration, exhibiting the strongest localized surface plasmon resonance enhancement. Under light irradiation, the optimized catalyst achieves an additional overpotential reduction of 22 mV at 100 mA cm −2 and a decreased Tafel slope of 60.47 mV dec −1 , highlighting the critical role of NP dimensions in regulating hot-carrier generation and interfacial charge-transfer efficiency. Importantly, the synergistic interaction between plasmon-induced electronic excitation and conductive interlayer engineering effectively promotes charge transport across the heterointerface and enhances the overall electrocatalytic process. This study provides new insights into the rational design of plasmon-enhanced electrocatalysts and offers a versatile strategy for integrating hot-carrier modulation with conductive interface engineering in solar-driven energy conversion systems.
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Small
·
2025
·
IF 12.1
Zi-Ye Liu,Jiu-Jiu Ge,Lei Yu,Sian-Hong Ong,Lian-Jian Zhang,Ji-Ming Hu
Efficient and durable alkaline water electrolysis at industrial current densities remains a key challenge due to sluggish oxygen evolution kinetics and poor stability of hydrogen evolution reaction (HER) catalysts in alkaline media. Herein, a unique Pt–Ni/Fe coordinated single-atom Pt catalyst anchored on nickel-iron layered double hydroxide (ePt/NiFe LDH), is reported synthesized via a facile electrodeposition process within 30 min. Unlike the conventional Pt-O-M (metal) coordination, the newly discovered Pt–Ni/Fe bonding structure significantly modulates the electronic structure of the NiFe active sites, thereby synergistically enhancing both HER and OER activities. Benefiting from this optimized coordination environment and the nanoflower architecture, the ePt/NiFe LDH@e-nf electrode delivers outstanding overall water splitting performance, achieving a low cell voltage of 1.42 V at 10 mA cm −2 and 1.54 V at 100 mA cm −2 without iR compensation. More importantly, it maintains ultrastable operation over 1440 h at an industrial-level current density of 500 mA cm −2 , outperforming commercial Pt/C–RuO₂ benchmarks. This work demonstrates a promising strategy for designing high-performance and durable single-atom catalysts for practical alkaline water electrolysis applications.
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INORGANIC CHEMISTRY
·
2023
·
IF 4.6
Zunpeng Hu,Senjie Dong,Quanfeng He,Zihao Chen,Ding Yuan
Developing electrocatalysts that integrate the merits of the hollow structure and heterojunction is an attractive but still challenging strategy for addressing the sluggish kinetics of oxygen evolution reaction (OER) in many renewable energy technologies. Herein, a 3D hierarchically flexible self-supporting electrode with a hollow heterostructure is intentionally constructed by assembling thin NiFe layered double hydroxide (LDH) nanosheets on the surface of metal–organic framework-derived hollow NiCo2O4 nanoflake arrays (NiCo2O4@NiFe-LDH) for rechargeable Zn–air batteries (ZABs). Theoretical calculations demonstrate that the interfacial electron transfer from NiFe-LDH to NiCo2O4 induces the electronic modulation, improves the conductivity, and lowers the reaction energy barriers during OER, ensuring high catalytic activity. Meanwhile, the 3D hierarchically hollow nanoarray architecture can afford plentiful catalytic active sites and short mass-/charge-transfer pathways. As a result, the obtained catalyst exhibits remarkable OER electrocatalytic performance, showing low overpotentials (only 231 mV at 10 mA cm–2, 300 mV at 50 mA cm–2) and robust stability. When assembling liquid and flexible solid-state ZABs with NiCo2O4@NiFe-LDH as the OER catalyst, the ZABs achieve excellent power density, high specific capacity, superior cycle durability, and good bending flexibility, exceeding the RuO2 + Pt/C benchmarks and other previously reported self-supporting catalysts. This work not only constructs an advanced hollow heterostructured catalyst for sustainable energy systems and wearable electronic devices but also provides insights into the role of interfacial electron modulation in catalytic performance enhancement.
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JOURNAL OF ALLOYS AND COMPOUNDS
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2025
·
IF 6.3
Guangyao Yang,Weiliang Peng,Jianwei Ye,Renzong Hu,Qiying Han,Sen Li,Bin Yuan
Although low-cost nickel-iron layered double hydroxide (NiFe LDH) has admirable electrolytic activity for oxygen evolution reaction (OER), the high energy barrier of hydrogen adsorption restricts its application as a bifunctional catalyst for alkaline overall water-splitting. Herein, sulfur (S) and phosphorus (P) elements have been co-introduced into a NiFe LDH on a nickel-iron foam (NIF) via sulfurating and phosphorizing co-thermal treatment, whereupon the phase composition and electronic structure are optimized, forming the (S, P)-NiFe LDH/NIF bifunctional catalyst. Benefiting from the synergy effect caused by the multiphasic interfaces, the (S, P)-NiFe LDH/NIF surprisingly exhibits an ultra-low overpotential of only 29 mV to induce hydrogen evolution reaction (HER) at a current density of 10 mA cm −2 , showing outstanding HER performance. In addition, the obtained catalyst also shows remarkable OER performance with an overpotential of only 190 mV at a current density of 10 mA cm −2 . Moreover, the symmetric electrolyzer assembled by the bifunctional (S, P)-NiFe LDH/NIF catalysts can deliver a current density of 100 mA cm −2 at a cell voltage of only 1.75 V, and maintain the reaction activity continuously for up to 200 h, showing excellent overall water-splitting performance. This work is expected to provide a new insight for designing and synthesizing bifunctional electrocatalysts based on low-cost NiFe LDH, further promoting and realizing the large-scale water-electrolysis.
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ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Xiaolong Guo,Xiaolin Hu,Dan Wu,Chuan Jing,Wei Liu,Zongling Ren,Qiannan Zhao,Xiaoping Jiang,Chaohe Xu,Yuxin Zhang,Ning Hu
The rational design of excellent electrocatalysts is significant for triggering the slow kinetics of oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in rechargeable metal–air batteries. Hereby, we report a bifunctional catalytic material with core–shell structure constructed by Co3O4 nanowire arrays as cores and ultrathin NiFe-layered double hydroxides (NiFe LDHs) as shells (Co3O4@NiFe LDHs). The introduction of Co3O4 nanowires could provide abundant active sites for NiFe LDH nanosheets. Most importantly, the deposition of NiFe LDHs on the surface of Co3O4 can modulate the surface chemical valences of Co, Ni, and Fe species via changing the electron donor and/or electron absorption effects, finally achieving the balance and optimization of ORR and OER properties. By this core–shell design, the maximum ORR current densities of Co3O4@NiFe LDHs increase to 3–7 mA cm–2, almost an order of magnitude increases compared to pure NiFe LDH (0.45 mA cm–2). Significantly, an OER overpotential as low as 226 mV (35 mA cm–2) is achieved in the designed core–shell catalyst, which is comparable to and/or even better than those of commercial Ir/C. Hence, the primary zinc–air battery employing Co3O4@NiFe LDH as an air electrode achieves a high specific capacity (667.5 mA h g–1) and first-class energy density (797.6 W h kg–1); the rechargeable battery can show superior reversibility, excellent stability, and voltage gaps of ∼0.8 V (∼60% of round-trip efficiency) in >1200 continuous cycles. Furthermore, the flexible quasi-solid-state zinc–air battery with bendable ability holds practical potential in portable and wearable electronic devices.
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JOURNAL OF SOLID STATE CHEMISTRY
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2024
·
IF 3.2
Xiaoyu Chen,Xiaoshuai Yu,Chuncheng Yang,Guoyong Wang
The oxygen evolution reaction is more challenging than the hydrogen evolution reaction in overall water splitting, not only because the four-electron reaction is more complex but also because the oxidizing environment of the anode reaction is more destructive to the electrode material. Generally, such destruction results in the formation of an oxide film that hinders the transition of electrons and subsequently decelerates the succeeding reaction. This paper proposes a transition layer for self-supporting electrodes (NiFe LDH@NiCoP/NF) in which NiCoP grows between the NF and NiFe LDH. The implementation of NiCoP as a transition layer, showcasing excellent antioxidation capability and conductivity, effectively reduced overpotentials and consequently enhanced the catalytic performance. Benefiting from this transition layer, in a 1.0 M KOH, the NiFe LDH@NiCoP/NF catalyst exhibited outstanding OER and HER performance, requiring only 281 and 102 mV, respectively, to achieve 100 and 10 mA cm −2 , and also exhibited a cell voltage for overall water splitting of 1.56 V at 10 mA cm −2 .
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