▲ Vol 08 Issue 02 | 01 February , 2023

In situ characterisation for nanoscale structure–performance studies in electrocatalysis

Tianlai Xia, Yu Yang, Qiang Song, Mingchuan Luo, Mianqi Xue, Kostya (Ken) Ostrikov, Yong Zhao and Fengwang Li

Recently, electrocatalytic reactions involving oxygen, nitrogen, water, and carbon dioxide have been developed to substitute conventional chemical processes, with the aim of producing clean energy, fuels and chemicals. A deepened understanding of catalyst structures, active sites and reaction mechanisms plays a critical role in improving the performance of these reactions. To this end, in situ/operando characterisations can be used to visualise the dynamic evolution of nanoscale materials and reaction intermediates under electrolysis conditions, thus enhancing our understanding of heterogeneous electrocatalytic reactions. In this review, we summarise the state-of-the-art in situ characterisation techniques used in electrocatalysis. We categorise them into three sections based on different working principles: microscopy, spectroscopy, and other characterisation techniques. The capacities and limits of the in situ characterisation techniques are discussed in each section to highlight the present-day horizons and guide further advances in the field, primarily aiming at the users of these techniques. Finally, we look at challenges and possible strategies for further development of in situ techniques.

https://pubs.rsc.org/en/content/articlelanding/2023/nh/d2nh00447j

▲ Vol 06 Issue 01 | February , 2023

Resveratrol-silica aerogel nanodrug complex system enhances the treatment of sports osteoarthritis by activating SIRT-1

Lili Qin, Guoxin Jing, Ningxin Cui, Zhen Xu, Yiwei He, Yao Qin, Tianfeng Lu, Jingyu Sun, Ai Du & Shilong Wang

Sports osteoarthritis (OA) is the most prevalent chronic joint disease in professional and recreational athletes. Resveratrol (RES), which is extracted from plants, has excellent anti-inflammatory properties. However, its application in OA treatment is limited by its poor water solubility, low bioavailability, and rapid metabolism. In this study, a silica aerogel (SA) was prepared through the sol–gel method and used to carry RES in the form of a nanodrug complex system (RSA) with a high drug–loading rate of 21.8% and a sustained release effect that lasted more than 6 hours. RSA had good biocompatibility in human chondrocytes when the concentration was less than 40 μg/mL and enhanced the anti-inflammatory actions of RES in vitro. A rat model of exercise-induced osteoarthritis was constructed to examine the therapeutic effects of RSA in vivo. Furthermore, the inflammatory factors involved in cartilage degradation and catabolism were reduced to 14.6–19.1% those of the original values after RES intervention, while the expression of type II collagen significantly increased. Moreover, RES was found to activate SIRT-1 by inhibiting the NF-κB-mediated inflammatory pathway, which also alleviated the degradation of cartilage matrix. These results indicated that the use of RSA could provide a novel noninvasive approach for targeted OA therapy with the potential for oral drug delivery.

https://link.springer.com/article/10.1007/s42114-022-00576-2

▲ Vol 135 Issue 09 | 20 February , 2023

Tough and Conductive Nacre-inspired MXene/Epoxy Layered Bulk Nanocomposites

Huagao Wang, Rongjian Lu, Jia Yan, Dr. Jingsong Peng, Prof. Antoni P. Tomsia, Rui Liang, Guoxing Sun, Prof. Mingjie Liu, Prof. Lei Jiang, Prof. Qunfeng Cheng

Inspired by nacre, the freeze-casting technique was applied to fabricate tough and conductive MXene/epoxy layered bulk nanocomposites, as reported by Qunfeng Cheng et al. in their Research Article (DOI: 10.1002/ange.202216874). The synergistic interfacial interactions between MXene lamellar scaffold and epoxy through surface chemical modification results in high-performance MXene/epoxy layered bulk nanocomposites, which exhibit excellent electromagnetic interference shielding efficiency.

https://onlinelibrary.wiley.com/doi/10.1002/ange.202301349

▲ Vol 13 Issue 05 | 03 February , 2023

MnAl Layered Double Hydroxides: A Robust Host for Aqueous Ammonium-Ion Storage with Stable Plateau and High Capacity

Qiang Liu, Fei Ye, Kailin Guan, Yunting Yang, Hongliang Dong, Yuping Wu, Zilong Tang, Linfeng Hu

Aqueous Ammonium-Ion Batteries
In article number 2202908, Linfeng Hu and co-workers report the first NH4+ storage behaviour in a MnAl layered double hydroxide (LDH) series. Intriguingly, a stable working voltage at 0.2 V is observed in the optimized sample with a high discharge capacity of 183.7 mAh g−1 at 0.1 A g−1. Rapid amorphization conversion during the first charge process is revealed in this LDH series.

https://onlinelibrary.wiley.com/doi/10.1002/aenm.202370018

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静远嘲风（MY Scimage） 成立于2007年，嘲风取自中国传统文化中龙生九子，子子不同的传说，嘲风为守护屋脊之瑞兽，喜登高望远；静远取自成语“宁静致远”，登高莫忘初心，远观而不可务远。