This reprint delves into the cutting-edge developments and applications of nanomaterials in energy storage and catalysis. The journey through this reprint begins with an exploration of advanced nanomaterials designed for energy storage applications, including batteries, supercapacitors and fuel cells. It delves into the fundamental principles governing their design, synthesis, characterization and performance optimization, highlighting key breakthroughs and emerging trends. Transitioning into catalysis, the reprint showcases the pivotal role of nanomaterials in catalytic processes for energy conversion, environmental remediation and sustainable chemical engineering. Readers gain valuable insights into design strategies, catalytic mechanisms and performance enhancements enabled by nanomaterial-based catalysts, showcasing their potential to revolutionize diverse sectors. Throughout this reprint, an emphasis is placed on the interdisciplinary nature of nanomaterial research, highlighting the synergistic integration of materials science, chemistry, physics, engineering and environmental science. Moreover, it underscores the importance of collaboration, knowledge exchange and continuous innovation in driving impactful solutions for global energy and environmental challenges.