APPLIED SURFACE SCIENCE
·
2022
·
IF 7.392
Jie Tang,Xiuhua Li,Yunfei Ma,Naizhang Xu,Yubing Liu,Qitao Zhang
Constructing composite semiconductor photocatalysts with intimate interfacial contact is crucial for efficient charge separation and surface reaction kinetics towards enhancing hydrogen evolution via photocatalytic water splitting. In this work, an in-situ interfacial P-Ni-P coordination strategy for band modulation and interfacial engineering of the Ni 2 P/P-PCN system is reported based on interstitial doping P and coupled Ni 2 P cocatalysts. As a non-noble metal composite catalyst, Ni 2 P/P-PCN displayed a photocatalytic hydrogen evolution rate (HER) of 1250 μmol h −1 g −1 , which was 1.4 times higher than that of Pt/P-PCN. The experimental characterization and theoretical calculation results showed that P dopant atoms at the P-PCN interface were coupled with Ni 2 P via interfacial P-Ni-P bonds. These acted as electron bridges that provided electron transfer channels at the interface, which greatly improved the interfacial compatibility between P-PCN and Ni 2 P. Combinedly, these effects promoted the rapid separation and transfer of photogenerated carriers. Thus, Ni 2 P/P-PCN can potentially replace Pt as a noble-metal-free cocatalyst for efficient synergistic HER under visible light irradiation.
研究领域:
材料科学
·
能源化学
·
催化科学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Xiao Xu,Yucheng Dong,Fangfang Liu,Hui Wang,Xuyun Wang,Xiaoyuan Li,Jianwei Ren,Rongfang Wang
Electrochemical urea electrolysis holds great potential for energy-efficient hydrogen production and wastewater treatment . However, developing cost-effective and highly active catalysts remains a challenge. In this study, a novel bifunctional electrocatalyst of Ni–Zn bimetallic nanosheets (ZnO–Ni 2 P) was synthesized on Ni foam (NF) for efficient urea decomposition in urea-containing wastewater. The results showed that inactive ZnO phase acted as an "electron pump", which facilitated electron redistribution between Ni and P atoms and created localized vacancies of Ni and P cations. This optimized electronic configuration enhanced the kinetics of both the urea oxidation reaction (UOR) and hydrogen evolution reaction (HER). Additionally, a unique particle-porous structure with abundant grain boundaries was achieved through the utilization of the Kirkendall Effect and Ostwald Ripening . In an alkaline urea electrolysis system , the alkaline urea electrolyzer assembled with ZnO–Ni 2 P/NF sample as both electrodes exhibited a low driving potential of only 1.424 V to achieve a current density of 10 mA cm −2 , which outperformed the commercial noble metal-based electrolyzer (RuO 2 ||Pt/C). The results verify that incorporating an inactive phase to manipulate the electronic structure of the active phase can be an effective strategy in developing catalysts for urea electrolysis.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Bowen Lu,Yanhui Wang,Wei Li,Shiwei Song,Pengfei Tian,Rushuo Li,Xueqing Tian,Xiangyu Liu,Jianbing Zang
The development of self-supporting electrodes that exhibited both high efficiency and good durability remained a challenge in the field of hydrogen energy utilisation. Here, we designed a self-supporting 3D hierarchical porous electrode by filling carbon nanotubes (CNTs) loaded with Ni–P alloy into the framework of nickel foam (NF). Firstly, CNTs were decorated with a catalytically active Ni–P alloy via electroless plating (Ni–P@CNTs). Then, the Ni–P@CNTs were filled and anchored onto the framework of NF via electroplating to synthesise a self-supporting electrode (Ni–P@CNTs/NF). The Ni–P@CNTs/NF exhibited an excellent catalytic performance toward the hydrogen evolution reaction (HER) in 1 M KOH electrolyte, with an overpotential of 53 mV at 10 mA cm −2 , a small Tafel slope of 101.56 mV dec −1 and excellent long-term durability. This facile and effective strategy might provide a new path to the design of self-supporting electrodes with enhanced HER catalytic.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2021
·
IF 4.539
Yun Zhong,Jianbin Tang,Xin Zhang,Xinpeng Wei,Mengyao Li,Yujia Feng,Jian Wang
Aerospace, military and precision electronic equipment urgently need efficient, lightweight and durable flexible electromagnetic interference (EMI) shielding fabrics to shield electromagnetic radiation . Inspired by mussels, the corrugated PPTA@PDA@CoNiP composite material with multi-reflection interfaces was designed on the surface of poly para-phenylene terephthalamide (PPTA) fabric through efficient self-assembly of polydopamine (PDA) and electroless deposition Co-Ni-P. The ferromagnetic Co-Ni-P formed a strong interface adhesion with the fabric, and constructed a closed magnetic conductive network (saturation magnetization of 50.8 emu/g and resistance value around 150 mΩ), which enabled electromagnetic radiation to be reflected and absorbed. Hence, PPTA@PDA@CoNiP fabric sample exhibited excellent electromagnetic interference shielding effectiveness (EMI SE, 76.9 dB), absorption loss (SE A , 58.7 dB) and reflection loss (SE R , 18.2 dB) through the synergistic effect of electrical loss and magnetic loss in X-band. PPTA@PDA@CoNiP fabric retained good electrical conductivity even after repeated bending for 1000 cycles. In addition, the fabric still had certain air permeability after deposition of Co-Ni-P, and the Co-Ni-P layer showed excellent corrosion resistance . Meanwhile, this work provided an efficient and green approach for constructing an electromagnetic shielding layer on the surface of an inert fabric.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
ChemElectroChem
·
2016
·Vol. 4
·期 2
·340-344
·
IF 3.506
Yan Li,Pinwwei Cai,Suqin Ci,Zhenhai Wen
Graphical Hydrogen evolution catalyst : Nanohybrids of Ni 2 P nanofilms on carbon nanosheets show high catalytic activity and excellent stability for the hydrogen evolution reaction in pH-universal electrolyte. A reliable strategy has been developed to prepare Ni 2 P nanofilms on carbon nanosheets (CNS) nanohybrids (Ni 2 P/CNS), which involves the preparation of three-dimensional (3D) CNS followed by in situ growth of Ni 2 P nanofilms on the surface of CNS. The Ni 2 P/CNS nanohybrids possess a robust 3D hierarchical structure, in which the Ni 2 P films are solidly overlaid on the surface of the CNS. The Ni 2 P/CNS nanohybrid was characterized by a variety of techniques, including X-ray diffraction (XRD), electron microscopy, X-ray photoelectron spectroscopy (XPS), etc. A series of electrochemical tests demonstrate the Ni 2 P/CNS nanohybrid shows high catalytic activity and excellent stability towards the hydrogen evolution reaction (HER) in pH-universal electrolyte, that is, in acidic, neutral, and basic media. The outstanding performance for Ni 2 P/CNS is correlated with the synergic effects between Ni 2 P and CNS associated with its unique and robust structure.
研究领域:
材料科学
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纳米技术
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电化学
·
能量转换
·
催化
✓ 已验证
DOI
高影响因子
RSC Advances
·
2021
·Vol. 11
·期 62
·39153-39168
·
IF 3.361
Bo Wu,Baizhao Tan,Guizhen Tan,Ming Zeng,Jinyi Luo,Guanghui Hu,Jiye Luo,Zhifeng Hao,Shaomei Lai,Binyun Liu
The green cyanide-free gold deposition is an important development direction in electroless gold plating. However, the commonly Au(I) based cyanide-free gold plating bath always suffers from severe corrosion to the Ni–P layer and unsatisfactory service life of the bath. In this work, a green and environmentally friendly cyanide-free gold plating bath was developed with hypophosphite added as a reducing agent into the Au(III)–DMH (5,5-dimethylhydantoin) based plating bath to retard the corrosion of the Ni–P layer. SEM micrographs combined with XRD and XPS analysis indicated that the electroless deposited gold was pure and compact. And XRD also revealed that the oriented deposition of gold was growing preferentially on Au (111). Corrosion tests, including salt spray tests, potentiodynamic polarization tests, and electrochemical impedance spectroscopy tests, indicated that the obtained Cu/Ni–P/Au coatings had significantly improved corrosion resistance performance with the loading of hypophosphite as the reducing agent. The baths remained transparent and no turbidity or precipitates were detected for 210 days, reflecting good stability. The detection for the Ni2+ concentration in the bath showed that adding hypophosphite could retard the replacement reaction between Au3+ and the Ni–P layer in part and this is important for decreasing the severe corrosion of the Ni–P layer. Moreover, Au was inactive for catalyzing the oxidation of hypophosphite during the deposition process which was confirmed furthermore via quantum chemical calculations. Therefore, our developed green cyanide-free electroless gold deposition process can beneficially provide research value and application prospects in microelectronic industry.
研究领域:
材料科学
·
电化学
·
环境科学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）