1
|
Luo N, Guo M, Cai H, Li X, Wang X, Cheng Z, Xue Z, Xu J. Engineering a Heterophase Interface by Tailoring the Pt Coverage Density on an Amorphous Ru Surface for Ultrasensitive H 2S Detection. ACS Sens 2023; 8:2237-2246. [PMID: 37208810 DOI: 10.1021/acssensors.3c00215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Amorphous/crystalline heterophase engineering is emerging as an attractive strategy to adjust the properties and functions of nanomaterials. Here, we reveal a heterophase interface role by precisely tailoring the crystalline Pt coverage density on an amorphous Ru surface (cPt/aRu) for ultrasensitive H2S detection. We found that when the atomic ratio of Pt/Ru increased from 10 to 50%, the loading modes of Pt changed from island coverage (1cPt/aRu) to cross-linkable coverage (3cPt/aRu) and further to dense coverage (5cPt/aRu). The differences in coverage models further regulate the chemical adsorption of H2S on Pt and the electronic transformation process on Ru, which can be proved by ex situ X-ray photoelectron spectroscopy experiments. Notably, a special cross-linkable coverage 3cPt/aRu on ZnO shows the best gas-sensitive performance, in which the operating temperature reduces from 240 to 160 °C compared with pristine ZnO and the selectivity coefficient for H2S gas improves from ∼1.2 to ∼4.6. This is mainly benefit from the maximized exposure of the amorphous/crystalline heterophase interface. Our work thus provides a new platform for future applications of amorphous/crystalline heterogeneous nanostructures in gas sensors and catalysis.
Collapse
Affiliation(s)
- Na Luo
- NEST Lab, Department of Physics, Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, P. R. China
| | - Mengmeng Guo
- NEST Lab, Department of Physics, Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, P. R. China
| | - Haijie Cai
- NEST Lab, Department of Physics, Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, P. R. China
| | - Xiaojie Li
- NEST Lab, Department of Physics, Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, P. R. China
| | - Xiaohong Wang
- NEST Lab, Department of Physics, Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, P. R. China
| | - Zhixuan Cheng
- NEST Lab, Department of Physics, Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, P. R. China
| | - Zhenggang Xue
- NEST Lab, Department of Physics, Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, P. R. China
| | - Jiaqiang Xu
- NEST Lab, Department of Physics, Department of Chemistry, College of Sciences, Shanghai University, Shanghai 200444, P. R. China
| |
Collapse
|
2
|
Osman S, Peng C, Li F, Chen H, Shen J, Zhong Z, Huang W, Xue D, Liu J. Defect-Induced Dense Amorphous/Crystalline Heterophase Enables High-Rate and Ultrastable Sodium Storage. Adv Sci (Weinh) 2022; 9:e2205575. [PMID: 36310102 PMCID: PMC9798978 DOI: 10.1002/advs.202205575] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 10/10/2022] [Indexed: 06/16/2023]
Abstract
Currently, the construction of amorphous/crystalline (A/C) heterophase has become an advanced strategy to modulate electronic and/or ionic behaviors and promote structural stability due to their concerted advantages. However, their different kinetics limit the synergistic effect. Further, their interaction functions and underlying mechanisms remain unclear. Here, a unique engineered defect-rich V2 O3 heterophase structure (donated as A/C-V2 O3- x @C-HMCS) composed of mesoporous oxygen-deficient amorphous - hollow core (A-V2 O3- x /HMC) and lattice-distorted crystalline shell (C-V2 O3 /S) encapsulated by carbon is rationally designed via a facile approach. Comprehensive density functional theory (DFT) calculations disclose that the lattice distortion enlarges the porous channels for Na+ diffusion in the crystalline phase, thereby optimizing its kinetics to be compatible with the oxygen-vacancy-rich amorphous phase. This significantly reduces the high contrast of the kinetic properties between the crystalline and amorphous phases in A/C-V2 O3- x @C-HMCS and induces the formation of highly dense A/C interfaces with a strong synergistic effect. As a result, the dense heterointerface effectively optimizes the Na+ adsorption energy and lowers the diffusion barrier, thus accelerating the overall kinetics of A/C-V2 O3- x @C-HMCS. In contrast, the perfect heterophase (defects-free) A/C-V2 O3 @C-HCS demonstrates sparse A/C interfacial sites with limited synergistic effect and sluggish kinetics. As expected, the A/C-V2 O3- x @C-HMCS achieves a high rate and ultrastable performance (192 mAh g-1 over 6000 cycles at 10 A g-1 ) when employed for the first time as a cathode for sodium-ion batteries (SIBs). This work provides general guidance for realizing dense heterophase cathode design for high-performance SIBs and beyond.
Collapse
Affiliation(s)
- Sahar Osman
- School of Materials Science and Engineering and Guangdong ProvincialKey Laboratory of Advanced Energy Storage MaterialsSouth China University of TechnologyGuangzhouGuangdong510641China
| | - Chao Peng
- Multiscale Crystal Materials Research CenterShenzhen Institute of Advanced TechnologyChinese Academy of ScienceShenzhen518055China
| | - Fangkun Li
- School of Materials Science and Engineering and Guangdong ProvincialKey Laboratory of Advanced Energy Storage MaterialsSouth China University of TechnologyGuangzhouGuangdong510641China
| | - Haoliang Chen
- School of Materials Science and Engineering and Guangdong ProvincialKey Laboratory of Advanced Energy Storage MaterialsSouth China University of TechnologyGuangzhouGuangdong510641China
| | - Jiadong Shen
- School of Materials Science and Engineering and Guangdong ProvincialKey Laboratory of Advanced Energy Storage MaterialsSouth China University of TechnologyGuangzhouGuangdong510641China
| | - Zeming Zhong
- School of Materials Science and Engineering and Guangdong ProvincialKey Laboratory of Advanced Energy Storage MaterialsSouth China University of TechnologyGuangzhouGuangdong510641China
| | - Wenjie Huang
- School of Materials Science and Engineering and Guangdong ProvincialKey Laboratory of Advanced Energy Storage MaterialsSouth China University of TechnologyGuangzhouGuangdong510641China
| | - Dongfeng Xue
- Multiscale Crystal Materials Research CenterShenzhen Institute of Advanced TechnologyChinese Academy of ScienceShenzhen518055China
| | - Jun Liu
- School of Materials Science and Engineering and Guangdong ProvincialKey Laboratory of Advanced Energy Storage MaterialsSouth China University of TechnologyGuangzhouGuangdong510641China
| |
Collapse
|