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Title: Isothermal decomposition kinetics of nickel (II) hydroxide powder

Journal Article · · Journal of Alloys and Compounds
 [1];  [2];  [2];  [1]
  1. National Energy Technology Lab. (NETL), Albany, OR (United States); AECOM, Albany, OR (United States)
  2. National Energy Technology Lab. (NETL), Albany, OR (United States)
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In this work, nickel (II) hydroxide powder was investigated by thermogravimetry for isothermal decomposition kinetics and verification of the Ni–O–H ternary phase diagram at low temperatures. The activation energy and frequency factor were measured as $$E_a$$ = 134 kJ/mol and A = 1.27 × 1010 s–1, respectively. The validity of the first-order random nucleation model was confirmed, as opposed to diffusion and or moving-boundary models. The dependence of TGA results on specimen size was noted. The Ni–Ni(OH)2–NiO phase triangle was confirmed. Accordingly, a thermodynamic description of the system was established in the Ni-rich corner, and the isotherm at room temperature is calculated.

Research Organization:
National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV, and Albany, OR (United States)
Sponsoring Organization:
USDOE Office of Fossil Energy (FE); AECOM
Grant/Contract Number:
AC26-04NT41817; FE0004000
OSTI ID:
1765263
Alternate ID(s):
OSTI ID: 1250208
Journal Information:
Journal of Alloys and Compounds, Vol. 644; ISSN 0925-8388
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 16 works
Citation information provided by
Web of Science

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Cited By (1)

Structural Evolution of Ni-Based Co-Catalysts on [Ca2Nb3O10]− Nanosheets during Heating and Their Photocatalytic Properties journal December 2019

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Related Subjects

36 MATERIALS SCIENCE
Nickel hydroxide
Thermal decomposition kinetics
Solid state reactions
Kinetics
Thermal analysis
X-ray diffraction