Matter
·
2024
·
IF 17.3
Xuechun Sun,Pengju Shi,Jiahui Shen,Jichuang Shen,Liuwen Tian,Jiazhe Xu,Qingqing Liu,Yuan Tian,Donger Jin,Xiaohe Miao,Jingjing Xue,Rui Wang
Compressive strain is often considered as a key factor in stabilizing formamidinium (FA)-based perovskites. However, the compression along which direction stabilizes perovskite remains unclear due to the presence of non-uniform strain within the material. Here, we introduce a metal encapsulation method to apply compressive strain along the in-plane or out-of-plane direction of perovskite film. According to the grazing-incidence wide-angle X-ray scattering (GIWAXS) results, in-plane compression enhances the stability of perovskites, whereas out-of-plane compression has a detrimental effect. Specifically, out-of-plane compression can lead to the formation of an inactive δ-phase, which compromises the stability of the perovskite. Finally, we develop a general process to integrate in-plane compression into perovskite solar cell (PSC) devices, thereby improving their stability. Our study clarifies the mechanism by which compressive strain affects perovskite stability, offering valuable guidance for strain engineering to optimize perovskite performance.
研究领域:
材料科学
·
光伏技术
✓ 已验证
DOI
高影响因子
Nature Synthesis
·
2025
·
IF 20
Wang Ruizhao,Dai Jie,Zhao Long,Hu Zhiwei,Chen Chien-Te,Kuo Chang-Yang,Zhan Guangming,Shi Yanbiao,Wang Jiaxian,Zou Yunjie,Xu Mingkai,Zou Xingyue,Zheng Qian,Zhou Bing,Wang Kaiyuan,Zhao Rui,Zhang Yan,Shen Yunhao,Yao Yancai,Zhang Lizhi
Electrochemical O 2 activation offers a green approach for efficient synthesis of singlet oxygen ( 1 O 2 ). However, it is commonly determined by adsorption-dependent O 2 activation and transformation and can suffer from the sluggish desorption of surface-bound *OOH. Here we report an adsorption-independent O 2 activation pathway for 1 O 2 electrosynthesis via an O 2 mono-hydrogenation process on compressive-strained rutile TiO 2 (CSR-TiO 2 ). This CSR-TiO 2 achieved an 1 O 2 generation rate of 148.26 μmol l −1 min −1 with near 100% Faradaic efficiency, outperforming the strain-free counterpart (35.97 μmol l −1 min −1 ) and other previously reported materials. Such superior performance of CSR-TiO 2 stemmed from compressive strain, which can suppress the formation of reductive unsaturated sites for the O 2 adsorption and enhance the reductive ability of atomic hydrogen (H*), favouring the O 2 mono-hydrogenation pathway and bypassing the traditional surface-bound *OOH desorption pathway. The generated 1 O 2 could be utilized for the selective oxidation of thioanisole and its derivatives, offering a promising strategy for green organic synthesis.
研究领域:
材料科学
·
电化学
·
绿色合成
✓ 已验证
产品关联
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2022
·Vol. 24
·期 45
·27923-27929
·
IF 3.945
Zechen Xiao,Zhi Li,Yuhan Jing,Ting Li,Dongyang Jiang,Yuxian Duan,Qianxu Ye,Liexing Zhou,Anran Chen,Jinming Cai
The HER requires a highly efficient, cost-effective, and stable catalyst to adapt to the large-scale hydrogen industry. Nickel has been confirmed to be useful to drive the water splitting reaction, but the intrinsic performance remains unsatisfactory. In this work, nickel (EG–Ni) with compressive strain was prepared through a one-step electrochemical deposition strategy. It shows an outstanding enhancement for the HER, and it achieves a current density of 10 mA cm−2 at a low overpotential of 85.9 mV. A long-term durability test proves that the EG–Ni can tolerate a large current density of 100 mA cm−2, and the overpotential remains steady without dramatically increasing. Such a low overpotential and superior stability are attributed to the optimized adsorption energy on the catalyst surface, as evidenced by the downshifted position of the d-band center.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Nano
·
2025
·
IF 16
Zhonghong Xia,Renqin Yu,Yan Wang,Kaiyang Xu,Kamel Eid,Yifan Zhang,Jia He,Fanghua Ning,Lifeng Liu,Jiujun Zhang,Huawei Yang,Hongbin Zhao,Dengsong Zhang
Engineering structural defects is beneficial for electrocatalytic performances. Herein, a class of acid-etched PtNiRh nanotubes with abundant structural defects around cavities were constructed. Modulated electronic and coordination structures closely associated with structural defects boost the ethanol oxidation reaction (EOR) activity and selectivity. The optimized PtNiRh-E-H nanotubes exhibit an EOR mass and specific activity of 1.81 A mgPt–1 and 3.38 mA cm–2, respectively. A high retention at 1.80 A mgPt–1 after a chronoamperometric test of 10000 s was achieved by PtNiRh-E-H nanotubes. Moreover, the PtNiRh-E-H nanotubes featuring compressive lattice strain and lower-lying d band center display a strong inclination for the C1 pathway, as evidenced by a higher linearly bonded CO band intensity and lower intensity of adsorbed acetate across the applied potentials using attenuated total-reflection surface-enhanced infrared absorption spectroscopy (ATR-SEIRAS). Also, the attenuated CO adsorption and accelerated CO oxidative desorption by OH species led to superior C1 selectivity of the PtNiRh-E-H nanotubes. Differential mass spectrometry (DEMS) together with ATR-SEIRAS provides explicit evidence of catalytic pathway as CH3CH2OH → CH3CH2OHads → ··· → CH3CHO → CH3CO → CH3 + CO → 2CO2. The work represents a feasible strategy for alcohol oxidation catalysis, wherein acid etching exposes significantly more structural defects and brings about an optimal electronic structure and lattice strain.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 64
·59816-59822
·
IF 3.289
Song Hao,Bingchu Yang,Yongli Gao
The fracture behavior of two-dimensional polycrystalline molybdenum disulfide (MoS2) films is essential to device performance and has attracted tremendous attention in recent years. Here, we investigate the mixed intergranular and transgranular fracture behaviors of CVD-grown polycrystalline MoS2 atomic layers using multiple techniques. The underlying mechanism is proposed to be that micro-cracks initially nucleate at grain boundary junctions and propagate along with the grain boundaries, resulting in intergranular fracture behavior. On the other hand, as-existed sulfur vacancies serve as crack nuclei and propagate along energy preference directions through Mo–S bond breaking, resulting in transgranular fracture behavior. Lattice shrinking induced compressive, rather than tensile strain is residual in fractured MoS2 microflakes, which enlarges the corresponding bandgap by ∼200 meV. Our work deepens the understanding of the fracture behaviors of polycrystalline MoS2 atomic layers and demonstrates a promising method to engineer the strain in MoS2-like atomically-thin materials to further tune their physical properties.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS A-GENERAL
·
2024
·
IF 4.7
XiaShuang Luo,CeHuang Fu,Zulipiya Shadike,Lu Ma,Lu An,LiuXuan Luo,YangGe Guo,JieWei Yin,XiaoHui Yan,MiaoMiao He,ShuiYun Shen,JunLiang Zhang
Engineering the surface Pt coordination environment is a promising strategy for promoting the kinetically sluggish oxygen reduction reaction (ORR) on Pt-based catalysts. In this study, we achieve the compressive strain effect and electronic effect by Cu and N co-doping to synthesize the PtCuN hollow nanospheres with PtN overlayers (PtCuN@PtN HNSs) using a facile solvothermal synthesis . Electrochemical investigations show that the constructed disordered Pt–N coordination structures effectively facilitate the ORR and stabilize Pt atoms in the compressed lattice, whereas an excessive N-doping can lead to the formation of a structurally unstable Pt nitride phase. Theoretical analyses confirm that the oxygen reduction kinetics on the compressed PtN overlayers are regulated by a synergistic effect resulting from N-doping and lattice compression, circumventing the traditional linear scaling relationships (LSR). The optimized PtCuN@PtN HNSs, with the composition of PtCu 0.29 N 1.1 , demonstrate an area-specific activity of 1.98 mA cm –2 and a mass-specific activity of 1.81 A mg Pt –1 .
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ADVANCED MATERIALS
·
2023
·Vol. 35
·期 36
·2301310
·
IF 29.4
Zichen Wang,Suhao Chen,Wei Wu,Runzhe Chen,Yu Zhu,Haoran Jiang,Liyue Yu,Niancai Cheng
The sluggish kinetics of oxygen reduction reaction (ORR) and unsatisfactory durability of Pt-based catalysts are severely hindering the commercialization of proton-exchange-membrane fuel cells (PEMFCs). In this work, the lattice compressive strain of Pt-skins imposed by Pt-based intermetallic cores is tailored for highly effective ORR through the confinement effect of the activated nitrogen-doped porous carbon (a-NPC). The modulated pores of a-NPC not only promote Pt-based intermetallics with ultrasmall size (average size of <4 nm), but also efficiently stabilizes intermetallic nanoparticles and sufficient exposure of active sites during the ORR process. The optimized catalyst (L1 2 -Pt 3 Co@ML-Pt/NPC 10 ) achieves excellent mass activity (1.72 A mg Pt −1 ) and specific activity (3.49 mA cm Pt −2 ), which are 11- and 15-fold that of commercial Pt/C, respectively. Besides, owing to the confinement effect of a-NPC and protection of Pt-skins, L1 2 -Pt 3 Co@ML-Pt/NPC 10 retains 98.1% mass activity after 30 000 cycles, and even 95% for 100 000 cycles, while Pt/C retains only 51.2% for 30 000 cycles. Rationalized by density functional theory, compared with other metals (Cr, Mn, Fe, and Zn), L1 2 -Pt 3 Co closer to the top of “volcano” induces a more suitable compressive strain and electronic structure on Pt-skin, leading to an optimal oxygen adsorption energy and a remarkable ORR performance.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Changxin Yuan,Xu Li,Ming Huang,Fei Li,Zongwen Zhang,Chunhui Wang,Wanbiao Hu
Traditional electromagnetic interference (EMI) shielding materials usually have constant shielding effectiveness and fixed absorption/reflection ratio, and cannot respond to the real-time changing shielding requirements of smart wearable electronic devices. Herein, smart asymmetric foams (AF) composed of chromium dioxide decorated graphene (CrO 2 @G)/thermoplastic polyurethane-poly vinyl alcohol (TP) foams and a eutectic gallium-indium liquid metal (LM)/TP layer were developed via an efficient ‘split conductive modular design/assembly’ strategy. The AF with compressive stress-controlled conductivity can capture and attenuate electromagnetic (EM) waves in the form of absorption-dominated or reflection-dominated by adjusting the compressive strain in real time. The optimized AF achieved a low average reflection coefficient (R) of 0.12 and a minimum value of 0.05, holding the lowest record for LM-based EMI shielding materials with comparable SEt. As the compressive strain increases from 0 to 90 %, the AF alter its SEt from 63.8 ± 3 dB to 92.7 ± 2 dB, while reducing the average EM wave absorption efficiency from 88 % to 39 %, allowing it to be adjusted in real time as needed to block EM waves. Furthermore, the AF demonstrated its application as a strain sensor to monitor human motions. This work provides an effective strategy for the design and preparation of multifunctional smart EMI shielding materials.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale
·
2022
·Vol. 14
·期 45
·17065-17071
·
IF 8.307
Yibin Zhao,Zhengwei Du,Licheng Wang,Mingyan Liu,Xudong Hu,Bing Yao,Xiaoming Li,Libo Gao,Cong Liu,Yi Wan,Erjun Kan
Strain engineering has been extensively applied as a promising strategy in the regulation of physical and chemical properties of two-dimensional (2D) materials, which remarkably broadens their application prospects in flexible electronics and chip manufacturing. However, the difficulty in fixing a flexible substrate under compression and the challenge in adjusting the focal distance have hindered the in-depth investigation of compressive strain. Here, we fabricated a home-made strain loading device and proposed a compressive strain measurement method, via which the strain-dependent optical absorption properties of MoS2 monolayers under compression has been studied. According to the measured optical absorption spectra, the first blueshift and then redshift trend under compression was obviously observed. The reliability of the experimentally observed trend in peak position shift was theoretically verified by density functional theory calculation. Our work offers a feasible way to characterize optical properties of 2D materials under compressive strain and expands the space for the development of next-generation micro/nano-scale optoelectronic devices.
研究领域:
材料科学
·
光电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2023
·Vol. 14
·期 1
·1-12
·
IF 16.6
Liu Kai,Yang Hao,Jiang Yilan,Liu Zhaojun,Zhang Shumeng,Zhang Zhixue,Qiao Zhun,Lu Yiming,Cheng Tao,Terasaki Osamu,Zhang Qing,Gao Chuanbo
Metastable noble metal nanocrystals may exhibit distinctive catalytic properties to address the sluggish kinetics of many important processes, including the hydrogen evolution reaction under alkaline conditions for water-electrolysis hydrogen production. However, the exploration of metastable noble metal nanocrystals is still in its infancy and suffers from a lack of sufficient synthesis and electronic engineering strategies to fully stimulate their potential in catalysis. In this paper, we report a synthesis of metastable hexagonal Pt nanostructures by coherent growth on 3 d transition metal nanocrystals such as Ni without involving galvanic replacement reaction, which expands the frontier of the phase-replication synthesis. Unlike noble metal substrates, the 3 d transition metal substrate owns more crystal phases and lower cost and endows the hexagonal Pt skin with substantial compressive strains and programmable charge density, making the electronic properties particularly preferred for the alkaline hydrogen evolution reaction. The energy barriers are greatly reduced, pushing the activity to 133 mA cm geo –2 and 17.4 mA μg Pt –1 at –70 mV with 1.5 µg of Pt in 1 M KOH. Our strategy paves the way for metastable noble metal catalysts with tailored electronic properties for highly efficient and cost-effective energy conversion.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Yingfang Zhu,Sihao Wang,Qingyu Luo,Haifu Huang,Shaolong Tang,Youwei Du
Developing electrocatalysts with high-Pt-utilization efficiency and appropriate surface oxygen affinity through a facile and scalable route is urgently needed for proton exchange membrane fuel cells. Here, SPD-annealing strategy is demonstrated to prepare ordered low-Pt-loading Pd–Pt–Fe nanoalloys with an average particle size of less than 5 nm and excellent electrocatalytic performance. Furthermore, the ORR performances of Pd–Pt–Fe/C nanoalloy catalysts are rationally modified by means of both precise composition control and structural transformation. With an optimal component proportion, the prepared Pd 0 . 75 Pt 0 . 25 Fe/C catalyst exhibits the most excellent intrinsic activity due to the synergistic interaction of lattice strain and ligand effect. Benefiting from the compressive strain effect induced by the relatively tight arrangement of the ordered structure, the adsorption energy of the intermediate oxygen-containing species is effectively weakened, enabling the Pd 0 . 75 Pt 0 . 25 Fe/C to obtain enhanced ORR catalytic performance in acidic condition. Notably, compared with the disordered Pd 0 . 75 Pt 0 . 25 Fe/C, the ordered Pd 0 . 75 Pt 0 . 25 Fe/C shows an extremely superior stability of 98.5% mass activity retention after 10 000 cycles. This work could provide a facile and versatile approach to constructing the ordered low-platinum electrocatalysts with enhanced ORR properties.
研究领域:
材料科学
·
电化学
·
能源科学
✓ 已验证
DOI
高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-11
·
IF 14.7
Du Yu,Xie Fakang,Lu Mengfei,Lv Rongxian,Liu Wangxi,Yan Yuandong,Yan Shicheng,Zou Zhigang
Compressive strain, downshifting the d -band center of transition metal oxides, is an effective way to accelerate the sluggish kinetics of oxygen evolution reaction (OER) for water electrolysis. Here, we find that anisotropic thermal expansion can produce compressive strains of the IrO 6 octahedron in Sr 2 IrO 4 catalyst, thus downshifting its d- band center. Different from the previous strategies to create constant strains in the crystals, the thermal-triggered compressive strains can be real-timely tuned by varying temperature. As a result of the thermal strain accelerating OER kinetics, the Sr 2 IrO 4 exhibits the nonlinear ln j o - T −1 ( j o , exchange current density; T , absolute temperature) Arrhenius relationship, resulting from the thermally induced low-barrier electron transfer in the presence of thermal compressive strains. Our results verify that the thermal field can be utilized to manipulate the electronic states of Sr 2 IrO 4 via thermal compressive strains downshifting the d -band center, significantly accelerating the OER kinetics, beyond the traditional thermal diffusion effects.
研究领域:
材料科学
·
电化学
·
催化
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）