TY  - JOUR
A1  - Yu, Hongtao
A1  - Quan, Ting
A1  - Mei, Shilin
A1  - Kochovski, Zdravko
A1  - Huang, Wei
A1  - Meng, Hong
A1  - Lu, Yan
T1  - Prompt Electrodeposition of Ni Nanodots on Ni Foam to Construct a High-Performance Water-Splitting Electrode
BT  - Efficient, Scalable, and Recyclable
JF  - Nano-Micro Letters
N2  - HighlightsFacile electrodeposition for fabricating active Ni nanodots (NiNDs) on Ni foam (NF) is shown.Binder- and heteroatom-free recyclable NiO/NiNDs@NF electrodes are efficiently made.NiO/NiNDs@NF bifunctional catalytic electrodes are used for water splitting. AbstractIn past decades, Ni-based catalytic materials and electrodes have been intensively explored as low-cost hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) catalysts for water splitting. With increasing demands for Ni worldwide, simplifying the fabrication process, increasing Ni recycling, and reducing waste are tangible sustainability goals. Here, binder-free, heteroatom-free, and recyclable Ni-based bifunctional catalytic electrodes were fabricated via a one-step quick electrodeposition method. Typically, active Ni nanodot (NiND) clusters are electrodeposited on Ni foam (NF) in Ni(NO3)(2) acetonitrile solution. After drying in air, NiO/NiND composites are obtained, leading to a binder-free and heteroatom-free NiO/NiNDs@NF catalytic electrode. The electrode shows high efficiency and long-term stability for catalyzing hydrogen and oxygen evolution reactions at low overpotentials ((10)(HER)=119mV and (50)(OER)=360mV) and can promote water catalysis at 1.70V@10mAcm(-2). More importantly, the recovery of raw materials (NF and Ni(NO3)(2)) is quite easy because of the solubility of NiO/NiNDs composites in acid solution for recycling the electrodes. Additionally, a large-sized (S similar to 70cm(2)) NiO/NiNDs@NF catalytic electrode with high durability has also been constructed. This method provides a simple and fast technology to construct high-performance, low-cost, and environmentally friendly Ni-based bifunctional electrocatalytic electrodes for water splitting.
KW  - Electrodeposition
KW  - Ni nanodots
KW  - Bifunctional catalysts
KW  - Water splitting
KW  - Large-size
Y1  - 2019
U6  - https://doi.org/10.1007/s40820-019-0269-x
SN  - 2311-6706
SN  - 2150-5551
VL  - 11
IS  - 41
PB  - Shanghai JIAO TONG univ press
CY  - Shanghai
ER  - 
TY  - JOUR
A1  - Weis, Philipp
A1  - Hess, Andreas
A1  - Kircher, Gunnar
A1  - Huang, Shilin
A1  - Auernhammer, Günter K.
A1  - Koynov, Kaloian
A1  - Butt, Hans-Jürgen
A1  - Wu, Si
T1  - Effects of Spacers on Photoinduced Reversible Solid-to-Liquid Transitions of Azobenzene-Containing Polymers
JF  - Chemistry - a European journal
N2  - Photoisomerization in some azobenzene-containing polymers (azopolymers) results in reversible solid-to-liquid transitions because trans- and cis-azopolymers have different glass transition temperatures. This property enables photoinduced healing and processing of azopolymers with high spatiotemporal resolution. However, a general lack of knowledge about the influence of the polymer structure on photoinduced reversible solid-to-liquid transitions hinders the design of such novel polymers. Herein, the synthesis and photoresponsive behavior of new azopolymers with different lengths of spacers between the polymer backbone and the azobenzene group on the side chain are reported. Azopolymers with no and 20 methylene spacers did not show photoinduced solid-to-liquid transitions. Azopolymers with 6 or 12 methylene spacers showed photoinduced solid-to-liquid transitions. This study demonstrates that spacers are essential for azopolymers with photoinduced reversible solid-to-liquid transitions, and thus, gives an insight into how to design azopolymers for photoinduced healing and processing.
KW  - azobenzenes
KW  - isomerization
KW  - photochemistry
KW  - polymers
KW  - self-healing
Y1  - 2019
U6  - https://doi.org/10.1002/chem.201902273
SN  - 0947-6539
SN  - 1521-3765
VL  - 25
IS  - 46
SP  - 10946
EP  - 10953
PB  - Wiley-VCH
CY  - Weinheim
ER  -