Insight into the local environment of nickel in VSB-1 before and after calcination

• F atoms were likely to have been coordinated to nickel.
• Approximately half of F− ions were removed by calcination.
• A considerable unit cell shrinkage, observed in VSB-1 after calcination, is explained.

The local environment of nickel in VSB-1, a nanoporous nickel phosphate material, was systematically investigated by a combination of X-ray absorption spectroscopy and multiple complementary techniques before and after calcination. A considerable unit cell shrinkage observed in VSB-1 after calcination is explained by the loss of F− ions and the corresponding changes in the nickel environment.

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