2019年4月5日 · Ni–Au SAAs form preferentially at the elbow regions of the Au(111) herringbone reconstruction, but at high coverage also appear over the whole surface. To investigate the adsorption properties of Ni–Au SAAs, we studied the adsorption and desorption of CO using STM which allowed us to determine at which atomic sites the CO adsorbs on these ...

2022年2月1日 · It has been established that the structural control of its hexagonal η -Cu 6 Sn 5 polymorph can be achieved over a wide temperature range of service conditions via chemical doping with Ni or Au, effectively suppressing the undesirable hexagonal to monoclinic (ƞ → ƞ′) phase transition at 186 °C and its associated volume change.

2023年9月15日 · Here, we discover unprecedented thermoelectric performance in metals and realize ultrahigh power factors up to 34 mW m −1 K −2 in binary Ni x Au 1–x alloys, more than twice larger than in any bulk material above room temperature, reaching zTmax ∼ 0.5.

2020年3月23日 · A Ni–Au catalytic system, which exhibits a highly selective CO production in CO2 hydrogenation, features an intact ultrathin Au shell over the Ni core before and after the reaction.

低温扫描隧道显微镜（STM）结合密度泛函理论计算证实，在高温下形成的Ni-Au SAA对应于与表面Au原子交换的Ni原子。 Ni-Au SAA优先形成在Au（111）人字形重建的肘部区域，但在整个表面上也会出现高覆盖率。

2017年5月1日 · During annealing, AuNiSn8, AuSn4, AuSn2 and AuSn layers are formed at the Sn−Ni/Au interface, and the values of n are smaller than 0.5. This indicates that both grain boundary diffusion and volume diffusion contribute to the rate-controlling growth processes of the compound layers and the grains in the compound layers.

2017年3月1日 · Operando XAFS analyses show the mixtures of Au and NiO are easily reduced to bimetallic nano-particles. The Au atoms promote the release of oxygen from nearby NiO within the cluster. Au-Ni bimetallic clusters were identified as possible automobile catalysts that do not contain a platinum-group metal (PGM).

2020年2月21日 · The incorporation of Au into the catalysts suppresses H2 adsorption on Ni, leading to lower hydrogen coverage during catalysis; this contributes to slowing undesirable alkene hydrogenation and improving catalyst selectivity.

2014年7月23日 · High work-function metals such as Ni, Pt, and Au in the form of multilayer structures, Ni/Au and Ni/Pt/Au, have been investigated as Schottky metallizations on AlGaN/GaN heterostructures under thermal annealing. As-deposited Ni/Pt/Au had slightly higher Schottky barrier height than its Ni/Au counterpart.

A unifying Ni migration mechanism is proposed, and methods of alleviating the electrode degradation are discussed. The hypothesis is that Ni migrates via surface diffusion of Ni(OH)x species below ca. 800°C and via Ni(OH)x species in gas phase above ca. 900°C.",