A sulfur-tolerant cathode catalyst fabricated with in situ exsolved CoNi alloy nanoparticles anchored on a Ruddlesden–Popper support for CO2 electrolysis

2020 ◽  
Vol 8 (1) ◽  
pp. 138-148 ◽  
Author(s):  
Seongmin Park ◽  
Yoongon Kim ◽  
Yuseong Noh ◽  
Taewook Kim ◽  
Hyunsu Han ◽  
...  
Keyword(s):  
Alloy Nanoparticles ◽  
Cathode Catalyst ◽  
Co2 Electrolysis

The schematic of CO2 electrolysis to produce CO in an SOEC under the conditions of CO2 gas containing H2S.

Highly efficient CO2 electrolysis to CO on Ruddlesden-Popper perovskite oxide with in situ exsolved Fe nanoparticles

2021 ◽  
Author(s):  
Junil Choi ◽  
Seongmin Park ◽  
Hyunsu Han ◽  
Minho Kim ◽  
Minseon Park ◽  
...  
Keyword(s):  
Solid Oxide ◽  
Perovskite Oxide ◽  
Electrolysis Cell ◽  
Cathode Catalyst ◽  
Highly Efficient ◽  
Highly Active ◽  
Fe Nanoparticles ◽  
Solid Oxide Electrolysis Cell ◽  
Co2 Electrolysis

We prepared a highly active and stable cathode catalyst for a solid oxide electrolysis cell (SOEC), decorated with in situ exsolved Fe nanoparticles (NPs) socketed on La1.2Sr0.8Mn0.4Fe0.6O4-α (R.P.LSMF), toward CO2...

scholarly journals Biocompatible Electrochemical Sensor Based on Platinum-Nickel Alloy Nanoparticles for In Situ Monitoring of Hydrogen Sulfide in Breast Cancer Cells

Nanomaterials ◽  
2022 ◽  
Vol 12 (2) ◽  
pp. 258
Author(s):  
Asit Kumar Panda ◽  
Murugan Keerthi ◽  
Rajalakshmi Sakthivel ◽  
Udesh Dhawan ◽  
Xinke Liu ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Hydrogen Sulfide ◽  
Electrochemical Sensor ◽  
Cancer Cells ◽  
Breast Cancer Cells ◽  
In Situ Monitoring ◽  
Quantitative Detection ◽  
Alloy Nanoparticles ◽  
Ptni Alloy

Hydrogen sulfide (H2S), an endogenous gasotransmitter, is produced in mammalian systems and is closely associated with pathological and physiological functions. Nevertheless, the complete conversion of H2S is still unpredictable owing to the limited number of sensors for accurate and quantitative detection of H2S in biological samples. In this study, we constructed a disposable electrochemical sensor based on PtNi alloy nanoparticles (PtNi NPs) for sensitive and specific in situ monitoring of H2S released by human breast cancer cells. PtNi alloy NPs with an average size of 5.6 nm were prepared by a simple hydrothermal approach. The conversion of different forms of sulfides (e.g., H2S, HS−, and S2−) under various physiological conditions hindered the direct detection of H2S in live cells. PtNi NPs catalyze the electrochemical oxidation of H2S in a neutral phosphate buffer (PB, pH 7.0). The PtNi-based sensing platform demonstrated a linear detection range of 0.013–1031 µM and the limit of detection was 0.004 µM (S/N = 3). Moreover, the PtNi sensor exhibited a sensitivity of 0.323 μA μM−1 cm−2. In addition, the stability, repeatability, reproducibility, and anti-interference ability of the PtNi sensor exhibited satisfactory results. The PtNi sensor was able to successfully quantify H2S in pond water, urine, and saliva samples. Finally, the biocompatible PtNi electrode was effectively employed for the real-time quantification of H2S released from breast cancer cells and mouse fibroblasts.

scholarly journals Thermal Stability Study of Classically Immiscible Rh-Ag Alloy Nanoparticles by in situ TEM

2016 ◽  
Vol 22 (S3) ◽  
pp. 820-821
Author(s):  
Cecile S. Bonifacio ◽  
Pranaw Kunal ◽  
Haiqin Wan ◽  
Simon M. Humphrey ◽  
Judith C. Yang
Keyword(s):  
Thermal Stability ◽  
Stability Study ◽  
In Situ Tem ◽  
Alloy Nanoparticles ◽  
Thermal Stability Study

scholarly journals Rational construction of a library of M29 nanoclusters from monometallic to tetrametallic

2019 ◽  
Vol 116 (38) ◽  
pp. 18834-18840 ◽  
Author(s):  
Xi Kang ◽  
Xiao Wei ◽  
Shan Jin ◽  
Qianqin Yuan ◽  
Xinqi Luan ◽  
...  
Keyword(s):  
Optical Properties ◽  
Physical Properties ◽  
In Situ Synthesis ◽  
Atomic Level ◽  
Metal Exchange ◽  
Alloy Nanoparticles ◽  
Synergetic Effects ◽  
Rational Construction ◽  
Target Metal

Exploring intermetallic synergy has allowed a series of alloy nanoparticles with prominent chemical–physical properties to be produced. However, precise alloying based on a maintained template has long been a challenging pursuit, and little has been achieved for manipulation at the atomic level. Here, a nanosystem based on M29(S-Adm)18(PPh3)4 (where S-Adm is the adamantane mercaptan and M is Ag/Cu/Au/Pt/Pd) has been established, which leads to the atomically precise operation on each site in this M29 template. Specifically, a library of 21 species of nanoclusters ranging from monometallic to tetrametallic constitutions has been successfully prepared step by step with in situ synthesis, target metal-exchange, and forced metal-exchange methods. More importantly, owing to the monodispersity of each nanocluster in this M29 library, the synergetic effects on the optical properties and stability have been mapped out. This nanocluster methodology not only provides fundamental principles to produce alloy nanoclusters with multimetallic compositions and monodispersed dopants but also provides an intriguing nanomodel that enables us to grasp the intermetallic synergy at the atomic level.

scholarly journals A novel method for in situ visualization of the growth kinetics, structures and behaviours of gas-phase fabricated metallic alloy nanoparticles

RSC Advances ◽  
2020 ◽  
Vol 10 (22) ◽  
pp. 13037-13042
Author(s):  
Lei Zhang ◽  
Long-Bing He ◽  
Lei Shi ◽  
Yu-Feng Yang ◽  
Guan-Lei Shang ◽  
...  
Keyword(s):  
Gas Phase ◽  
Growth Kinetics ◽  
Metallic Alloy ◽  
Alloy Nanoparticles ◽  
In Situ Visualization ◽  
Novel Method

In situ visualizing the growth kinetics and behaviours of alloy nanoparticles by a novel EAD method.

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